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Frage 1
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Energy is the [blank_start]capacity[blank_end] to do [blank_start]work[blank_end].
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capacity
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work
Frage 2
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Work is the result of a [blank_start]force[blank_end] acting through a [blank_start]distance[blank_end].
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force
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distance
Frage 3
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What are the two primary methods through which objects or sets of objects exchange energy?
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heat and mass
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heat and work
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motion and heat
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attraction and work
Frage 4
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The energy associated with the motion of an object is its [blank_start]kinetic[blank_end] energy.
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kinetic
Frage 5
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The energy associated with the position or composition of an object is its [blank_start]potential[blank_end] energy.
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potential
Frage 6
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[blank_start]Chemical[blank_end] energy, a form of potential energy, is associated with the relative positions of electrons and nuclei in atoms and molecules.
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Chemical
Frage 7
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The energy associated with the temperature of an object is its [blank_start]thermal[blank_end] energy.
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thermal
Frage 8
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The law of conservation of energy, or the first law of thermodynamics, states that energy can be neither created nor destroyed. This means that the total energy of the universe is constant.
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- True
- False
Frage 9
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The SI unit of energy is the joule (J). Which of the following is true about this unit?
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1 J = 1 g * m^2 / s^2
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1 J = 1 kg * m^2 / s^2
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1 J = 1 kg * m / s^2
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1 J = 1 kg * m^2 / h^2
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1 J = 1 kg * m^2 / s
Frage 10
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Besides joules, a calorie is another commonly used energy unit:
1 cal = [blank_start]4.184[blank_end] J
1 Cal = 1 [blank_start]kcal[blank_end] = [blank_start]1000[blank_end] cal
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kcal
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1000
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4.184
Frage 11
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Besides joules, a kilowatt-hour is another unit of energy commonly used for electricity bills:
1 kWh = [blank_start]3.60[blank_end] * [blank_start]10^6[blank_end] J
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3.60
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10^6
Frage 12
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The internal energy (E) of a system is the sum of the kinetic and potential energies of all of the particles that compose the system.
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- True
- False
Frage 13
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Internal energy is a state function, which means that its value depends only on the state of the system, not on how the system arrived at that state.
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- True
- False
Frage 14
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Which of the following is true about a system's energy?
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ΔE(sys) = -ΔE(surr)
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2ΔE(sys) = -ΔE(surr)
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ΔE(sys) = ΔE(surr)
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ΔE(sys) = -3ΔE(surr)
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-ΔE(sys) = -ΔE(surr)
Frage 15
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If the reactants have a higher internal energy than the products, ΔE(sys) is [blank_start]negative[blank_end] and energy flows [blank_start]out of[blank_end] the system into the surroundings. If the reactants have a lower internal energy than the products, ΔE(sys) is [blank_start]positive[blank_end] and
energy flows [blank_start]into[blank_end] the system from the surroundings.
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negative
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out of
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positive
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into
Frage 16
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Which of the following represents heat?
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H
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q
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w
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ΔE
Frage 17
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Which of the following represents change in internal energy for a given system?
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ΔQ
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ΔI
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ΔE
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ΔH
Frage 18
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ΔE = [blank_start]q[blank_end] + [blank_start]w[blank_end]
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q
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w
Frage 19
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What is the difference between heat and thermal energy?
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Temperature is a measure of the thermal energy within a sample of matter, whereas heat is the transfer of thermal energy.
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Heat is a measure of the thermal energy within a sample of matter, whereas temperature is the transfer of thermal energy.
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Temperature is a measure of the total energy within a sample of matter, whereas heat is a measure of temperature change.
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Heat is a measure of the total thermal energy within a sample of matter, whereas temperature is a measure of heat change.
Frage 20
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The constant of proportionality between q and ΔT is the system’s heat capacity (C), a measure of the system’s ability to absorb thermal energy without undergoing a large change in temperature. C is defined as the quantity of heat required to change a system's temperature by 1 °C:
q = [blank_start]C[blank_end] × Δ[blank_start]T[blank_end]
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C
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T
Frage 21
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What is the difference between heat capacity and specific heat capacity?
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Heat capacity is the ratio of the amount of energy absorbed to the associated temperature rise, whereas specific heat capacity is the heat capacity of a substance per unit mass.
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Specific heat capacity is the ratio of the amount of energy absorbed to the associated temperature rise, whereas heat capacity is the specific heat capacity of a substance per unit mass.
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Heat capacity is the ratio of the amount of energy absorbed, whereas specific heat capacity is the difference in heat capacity.
Frage 22
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Which of the following is true about heat?
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q = m / C(s) × ΔT
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q = 2m × C × ΔT
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q = m × C(s)
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q = m × C(s) × ΔT
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q = m × C / ΔT
Frage 23
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F = [blank_start]P[blank_end] * [blank_start]A[blank_end]
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P
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A
Frage 24
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w = -[blank_start]P[blank_end]Δ[blank_start]V[blank_end]
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P
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V
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