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Quiz von Peace Adefioye, aktualisiert more than 1 year ago
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Erstellt von Peace Adefioye
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Frage 1
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A thermodynamics system is separated from the rest of the universe by a membrane, which delimits a finite volume and through which heat or other forms of energy may pass.
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- True
- False
Frage 2
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Regions outside the boundaries of the system are termed extra system
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- True
- False
Frage 3
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Homogeneous thermodynamic system has two or more phases, which are separated from one another by definite bounding surfaces.
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- True
- False
Frage 4
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An intensive variable is a physical quantity whose value depends on the amount of the substance
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- True
- False
Frage 5
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Changes in a thermodynamic system are often described by differentials of its state variables
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- True
- False
Frage 6
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Most thermodynamic equations are functions with several variables
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- True
- False
Frage 7
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For a given amount of substance temperature, pressure and volume are not independent from each other. They are connected by an equation of state.
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- True
- False
Frage 8
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Differentiation means finding slopes or the rate of change of one variable with respect to another
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- True
- False
Frage 9
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Small changes in a state function with several variables can be represented by a total differential. For this, all partial differentials of this function must be added.
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- True
- False
Frage 10
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Temperature and pressure are extensive variables
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- True
- False
Frage 11
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The total energy of the system and its surroundings is conserved
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- True
- False
Frage 12
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Energy may be extracted from an object from an object either by cooling, compression, or extraction of matter
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- True
- False
Frage 13
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A system is said to be in thermodynamic equilibrium when any of its properties such as temperature, pressure, colume etc. change with time
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- True
- False
Frage 14
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Each thermodynamic process is distinguished from other processes in energetic character, according to what parameters, such as temperature, pressure, or volume etc are held constant.
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- True
- False
Frage 15
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Reversible thermodynamic processes are processes, which develop so slowly as to allow each intermediate step to be an equilibrium state
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- True
- False
Frage 16
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Dissipative structures are stationary states with completely new qualities
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- True
- False
Frage 17
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Density is an intensive variable.
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- True
- False
Frage 18
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An isobaric process occurs at constant volume.
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- True
- False
Frage 19
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Thermodynamic systems possess energy, but not heat or work. Heat and work are transfer phenomena.
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- True
- False
Frage 20
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The pressure, temperature and chemical potential are the generalized forces, which drive the generalized changes in volume, entropy and particle number respectively.
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- True
- False
Frage 21
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Heat and work are not state variables
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- True
- False
Frage 22
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Force-displacement is a conjugate pair
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- True
- False
Frage 23
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dU represents an infinitesimal change in internal energy
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- True
- False
Frage 24
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A process during which there is no heat transfer is called an isothermal process.
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- True
- False
Frage 25
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The internal energy is an extensive property of a system while the internal energy per mole is an intensive state property of that system
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- True
- False
Frage 26
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Conjugate variables are sets of intensive and extensive variables whose product has the dimensions of energy.
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- True
- False
Frage 27
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A system is in a particular thermodynamic state when values of the properties of the system called as [blank_start]variables of state[blank_end] are known.
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variables of state
Frage 28
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There are three main types of systems: [blank_start]closed[blank_end], [blank_start]open[blank_end] and [blank_start]isolated[blank_end] systems.
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closed
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open
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isolated
Frage 29
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In open systems, [blank_start]matter[blank_end], [blank_start]energy[blank_end] and [blank_start]work[blank_end] may cross the boundary.
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matter
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energy
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work
Frage 30
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The variables of state are four in number: [blank_start]temperature[blank_end], [blank_start]pressure[blank_end], [blank_start]volume[blank_end], [blank_start]composition[blank_end].
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composition
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volume
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pressure
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temperature
Frage 31
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A system is [blank_start]homogeneous[blank_end] when it has the same chemical composition throughout.
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homogeneous
Frage 32
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[blank_start]Thermodynamic state[blank_end] is defined as the instantaneous quantitative description of a system with a set number of variables held constant.
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Thermodynamic state
Frage 33
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In closed systems, [blank_start]energy[blank_end] cannot cross the boundary,
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energy
Frage 34
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Viscosity and specific heat are [blank_start]extensive[blank_end] variables.
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extensive
Frage 35
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Small changes in a state function with several variables can be represented by the so-called [blank_start]differential[blank_end].
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differential
Frage 36
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A system, in which all equalizing processes have gone to completion, is said to be in a state of [blank_start]thermodynamic equilibrium[blank_end].
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thermodynamic equilibrium
Frage 37
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An [blank_start]isentropic[blank_end] process occurs at constant entropy.
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isentropic
Frage 38
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Total differential of a function y=f(x) can be calculated from the product of [blank_start]the first derivative[blank_end] of the function and dx.
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the first derivative
Frage 39
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An [blank_start]extensive[blank_end] variable can be expressed as the sum of the quantities for the separate subsystems that compose the entire system.
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extensive
Frage 40
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An [blank_start]isobaric[blank_end] process occurs at constant pressure.
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isobaric
Frage 41
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A [blank_start]thermodynamic process[blank_end] is defined as the energetic progression of a thermodynamic system proceeding from an initial state to a final state.
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thermodynamic process
Frage 42
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Refractive index is a(n) [blank_start]extensive[blank_end] variable.
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extensive
Frage 43
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The most common conjugate thermodynamic variables are [blank_start]pressure-volume[blank_end]; [blank_start]temperature-entropy[blank_end]; [blank_start]chemical potential-particle number[blank_end].
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pressure-volume
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temperature-entropy
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chemical potential-particle number
Frage 44
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A system has three types of equilibrium: [blank_start]thermal[blank_end], [blank_start]chemical[blank_end] and [blank_start]mechanical[blank_end].
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thermal
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chemical
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mechanical
Frage 45
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An [blank_start]isothermal[blank_end] process occurs without loss or gain of heat.
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isothermal
Frage 46
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The properties of the system can be described by an equation of [blank_start]differentials[blank_end], which specifies the relationship between state variables.
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differentials
Frage 47
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Energy may be transferred into a body by [blank_start]heating[blank_end], compression, or addition of matter.
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heating
Frage 48
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Thermodynamic systems transfer energy as the result of a [blank_start]generalized force[blank_end] causing a generalized displacement, with the product of the two being the amount of energy transferred.
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generalized force
Frage 49
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Quantities describing the state of a system, such as internal energy, pressure, volume, temperature, and mass are called [blank_start]thermodynamic variables[blank_end].
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thermodynamic variables
Frage 50
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An idealized process that is carried out at constant temperature is called an [blank_start]isothermal process[blank_end].
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isothermal process
Frage 51
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The amount of heat transferred per unit time is called [blank_start]rate of heat[blank_end].
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rate of heat
Frage 52
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The work done per unit time is called [blank_start]rate of work[blank_end].
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rate of work
Frage 53
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In a closed system, the [blank_start]energy[blank_end] and chemical composition of the constituents remain constant.
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energy
Frage 54
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The word thermodynamics stems from two stems Greek words meaning:
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conservation of heat
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interactions of heat
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study of heat
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movement of heat
Frage 55
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In thermodynamic processes, which of the following statements is NOT true?
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In an isochoric process the pressure remains constant
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In an isothermal process the temperature remains constant
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In an adiabatic process the system is insulated from the surroundings
Frage 56
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A process, in which the working substance neither receives nor gives heat to its surroundings during expansion or compression is called
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isothermal process
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hyperbolic process
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adiabatic process
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none of the above
Frage 57
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Which of the following is NOT a state variable?
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Work
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Interal energy
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Entropy
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Temperature
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Pressure
Frage 58
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Heat flow is considered negative when heat flows [ ] a system; work is considered positive when work is done [ ] a system.
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out of; by
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into; by
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out of; on
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into; on
Frage 59
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Because internal energy U is a state variable and depends only on the state of the system but not on how the system has achieved that state, we can write:
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-
dU = 0
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dU = U2 - U1
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dU = Q + W
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dU = U1 - U2
Frage 60
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Which of the following laws of physics has become the foundation of thermodynamics?
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Newton's laws of motion
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the law of conservation of energy
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the law of universal gravitation
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the law of conservation of momentum
Frage 61
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According to the laws of thermodynamics, all processes occuring in nature are
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reversible and unidirectional
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irreversible and unidirectional
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reversible and bidirectional
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irreversible and bidirectional
Frage 62
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Which of the following is TRUE about thermodynamics?
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It is based on the conservation principle
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It deals with energy
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It refers to direction of heat movements
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All of the above
Frage 63
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Which of the following are reversible process(es)?
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Slow heating of water from a hot source
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Constant pressure heating of an ideal gas from a constant temperature source
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Evaporation of a liquid at constant temperature
Frage 64
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Ice kept in a well insulated container is an example of which system?
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a closed system
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an isolated system
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an open system
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a diathermic system
Frage 65
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Thermodynamic work is the product of
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two intensive properties
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two extensive properties
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an intensive property and change and change in an extensive property
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an extensive property and change in an intensive property
Frage 66
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Which of the following is an intensive property?
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Kinetic Energy
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Gravitational potential energy
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Pressure
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Entropy
Frage 67
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Pressure and volume are thermodynamic parameters. Their product is expressed in units [ ]
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mass
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energy
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temperature
Frage 68
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In an irreversible process, there is [ ]
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no loss of mass
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no gain of energy
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gain of heat
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loss of heat
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