3747317
Questão 1
Questão
Energy is the [blank_start]capacity[blank_end] to do [blank_start]work[blank_end].
Responda
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capacity
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work
Questão 2
Questão
Work is the result of a [blank_start]force[blank_end] acting through a [blank_start]distance[blank_end].
Responda
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force
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distance
Questão 3
Questão
What are the two primary methods through which objects or sets of objects exchange energy?
Responda
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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
Questão 4
Questão
The energy associated with the motion of an object is its [blank_start]kinetic[blank_end] energy.
Responda
-
kinetic
Questão 5
Questão
The energy associated with the position or composition of an object is its [blank_start]potential[blank_end] energy.
Responda
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potential
Questão 6
Questão
[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.
Responda
-
Chemical
Questão 7
Questão
The energy associated with the temperature of an object is its [blank_start]thermal[blank_end] energy.
Responda
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thermal
Questão 8
Questão
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.
Responda
- True
- False
Questão 9
Questão
The SI unit of energy is the joule (J). Which of the following is true about this unit?
Responda
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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
Questão 10
Questão
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
Responda
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kcal
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1000
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4.184
Questão 11
Questão
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
Responda
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3.60
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10^6
Questão 12
Questão
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.
Responda
- True
- False
Questão 13
Questão
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.
Responda
- True
- False
Questão 14
Questão
Which of the following is true about a system's energy?
Responda
-
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)
Questão 15
Questão
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.
Responda
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negative
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out of
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positive
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into
Questão 16
Questão
Which of the following represents heat?
Responda
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H
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q
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w
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ΔE
Questão 17
Questão
Which of the following represents change in internal energy for a given system?
Responda
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ΔQ
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ΔI
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ΔE
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ΔH
Questão 18
Questão
ΔE = [blank_start]q[blank_end] + [blank_start]w[blank_end]
Responda
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q
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w
Questão 19
Questão
What is the difference between heat and thermal energy?
Responda
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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.
Questão 20
Questão
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]
Responda
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C
-
T
Questão 21
Questão
What is the difference between heat capacity and specific heat capacity?
Responda
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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.
Questão 22
Questão
Which of the following is true about heat?
Responda
-
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
Questão 23
Questão
F = [blank_start]P[blank_end] * [blank_start]A[blank_end]
Responda
-
P
-
A
Questão 24
Questão
w = -[blank_start]P[blank_end]Δ[blank_start]V[blank_end]
Responda
-
P
-
V
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