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Biophysics 02 - Subjects of Thermodynamics

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Quiz on Biophysics 02 - Subjects of Thermodynamics, created by Peace Adefioye on 27/12/2018.
Peace Adefioye
Quiz by Peace Adefioye, updated more than 1 year ago
Peace Adefioye
Created by Peace Adefioye almost 6 years ago
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Resource summary

Question 1

Question
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.
Answer
  • True
  • False

Question 2

Question
Regions outside the boundaries of the system are termed extra system
Answer
  • True
  • False

Question 3

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Homogeneous thermodynamic system has two or more phases, which are separated from one another by definite bounding surfaces.
Answer
  • True
  • False

Question 4

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An intensive variable is a physical quantity whose value depends on the amount of the substance
Answer
  • True
  • False

Question 5

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Changes in a thermodynamic system are often described by differentials of its state variables
Answer
  • True
  • False

Question 6

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Most thermodynamic equations are functions with several variables
Answer
  • True
  • False

Question 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.
Answer
  • True
  • False

Question 8

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Differentiation means finding slopes or the rate of change of one variable with respect to another
Answer
  • True
  • False

Question 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.
Answer
  • True
  • False

Question 10

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Temperature and pressure are extensive variables
Answer
  • True
  • False

Question 11

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The total energy of the system and its surroundings is conserved
Answer
  • True
  • False

Question 12

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Energy may be extracted from an object from an object either by cooling, compression, or extraction of matter
Answer
  • True
  • False

Question 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
Answer
  • True
  • False

Question 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.
Answer
  • True
  • False

Question 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
Answer
  • True
  • False

Question 16

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Dissipative structures are stationary states with completely new qualities
Answer
  • True
  • False

Question 17

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Density is an intensive variable.
Answer
  • True
  • False

Question 18

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An isobaric process occurs at constant volume.
Answer
  • True
  • False

Question 19

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Thermodynamic systems possess energy, but not heat or work. Heat and work are transfer phenomena.
Answer
  • True
  • False

Question 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.
Answer
  • True
  • False

Question 21

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Heat and work are not state variables
Answer
  • True
  • False

Question 22

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Force-displacement is a conjugate pair
Answer
  • True
  • False

Question 23

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dU represents an infinitesimal change in internal energy
Answer
  • True
  • False

Question 24

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A process during which there is no heat transfer is called an isothermal process.
Answer
  • True
  • False

Question 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
Answer
  • True
  • False

Question 26

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Conjugate variables are sets of intensive and extensive variables whose product has the dimensions of energy.
Answer
  • True
  • False

Question 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.
Answer
  • variables of state

Question 28

Question
There are three main types of systems: [blank_start]closed[blank_end], [blank_start]open[blank_end] and [blank_start]isolated[blank_end] systems.
Answer
  • closed
  • open
  • isolated

Question 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.
Answer
  • matter
  • energy
  • work

Question 30

Question
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].
Answer
  • composition
  • volume
  • pressure
  • temperature

Question 31

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A system is [blank_start]homogeneous[blank_end] when it has the same chemical composition throughout.
Answer
  • homogeneous

Question 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.
Answer
  • Thermodynamic state

Question 33

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In closed systems, [blank_start]energy[blank_end] cannot cross the boundary,
Answer
  • energy

Question 34

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Viscosity and specific heat are [blank_start]extensive[blank_end] variables.
Answer
  • extensive

Question 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].
Answer
  • differential

Question 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].
Answer
  • thermodynamic equilibrium

Question 37

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An [blank_start]isentropic[blank_end] process occurs at constant entropy.
Answer
  • isentropic

Question 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.
Answer
  • the first derivative

Question 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.
Answer
  • extensive

Question 40

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An [blank_start]isobaric[blank_end] process occurs at constant pressure.
Answer
  • isobaric

Question 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.
Answer
  • thermodynamic process

Question 42

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Refractive index is a(n) [blank_start]extensive[blank_end] variable.
Answer
  • extensive

Question 43

Question
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].
Answer
  • pressure-volume
  • temperature-entropy
  • chemical potential-particle number

Question 44

Question
A system has three types of equilibrium: [blank_start]thermal[blank_end], [blank_start]chemical[blank_end] and [blank_start]mechanical[blank_end].
Answer
  • thermal
  • chemical
  • mechanical

Question 45

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An [blank_start]isothermal[blank_end] process occurs without loss or gain of heat.
Answer
  • isothermal

Question 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.
Answer
  • differentials

Question 47

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Energy may be transferred into a body by [blank_start]heating[blank_end], compression, or addition of matter.
Answer
  • heating

Question 48

Question
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.
Answer
  • generalized force

Question 49

Question
Quantities describing the state of a system, such as internal energy, pressure, volume, temperature, and mass are called [blank_start]thermodynamic variables[blank_end].
Answer
  • thermodynamic variables

Question 50

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An idealized process that is carried out at constant temperature is called an [blank_start]isothermal process[blank_end].
Answer
  • isothermal process

Question 51

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The amount of heat transferred per unit time is called [blank_start]rate of heat[blank_end].
Answer
  • rate of heat

Question 52

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The work done per unit time is called [blank_start]rate of work[blank_end].
Answer
  • rate of work

Question 53

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In a closed system, the [blank_start]energy[blank_end] and chemical composition of the constituents remain constant.
Answer
  • energy

Question 54

Question
The word thermodynamics stems from two stems Greek words meaning:
Answer
  • conservation of heat
  • interactions of heat
  • study of heat
  • movement of heat

Question 55

Question
In thermodynamic processes, which of the following statements is NOT true?
Answer
  • In an isochoric process the pressure remains constant
  • In an isothermal process the temperature remains constant
  • In an adiabatic process the system is insulated from the surroundings

Question 56

Question
A process, in which the working substance neither receives nor gives heat to its surroundings during expansion or compression is called
Answer
  • isothermal process
  • hyperbolic process
  • adiabatic process
  • none of the above

Question 57

Question
Which of the following is NOT a state variable?
Answer
  • Work
  • Interal energy
  • Entropy
  • Temperature
  • Pressure

Question 58

Question
Heat flow is considered negative when heat flows [ ] a system; work is considered positive when work is done [ ] a system.
Answer
  • out of; by
  • into; by
  • out of; on
  • into; on

Question 59

Question
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:
Answer
  • dU = 0
  • dU = U2 - U1
  • dU = Q + W
  • dU = U1 - U2

Question 60

Question
Which of the following laws of physics has become the foundation of thermodynamics?
Answer
  • Newton's laws of motion
  • the law of conservation of energy
  • the law of universal gravitation
  • the law of conservation of momentum

Question 61

Question
According to the laws of thermodynamics, all processes occuring in nature are
Answer
  • reversible and unidirectional
  • irreversible and unidirectional
  • reversible and bidirectional
  • irreversible and bidirectional

Question 62

Question
Which of the following is TRUE about thermodynamics?
Answer
  • It is based on the conservation principle
  • It deals with energy
  • It refers to direction of heat movements
  • All of the above

Question 63

Question
Which of the following are reversible process(es)?
Answer
  • Slow heating of water from a hot source
  • Constant pressure heating of an ideal gas from a constant temperature source
  • Evaporation of a liquid at constant temperature

Question 64

Question
Ice kept in a well insulated container is an example of which system?
Answer
  • a closed system
  • an isolated system
  • an open system
  • a diathermic system

Question 65

Question
Thermodynamic work is the product of
Answer
  • two intensive properties
  • two extensive properties
  • an intensive property and change and change in an extensive property
  • an extensive property and change in an intensive property

Question 66

Question
Which of the following is an intensive property?
Answer
  • Kinetic Energy
  • Gravitational potential energy
  • Pressure
  • Entropy

Question 67

Question
Pressure and volume are thermodynamic parameters. Their product is expressed in units [ ]
Answer
  • mass
  • energy
  • temperature

Question 68

Question
In an irreversible process, there is [ ]
Answer
  • no loss of mass
  • no gain of energy
  • gain of heat
  • loss of heat
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