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Study Quiz 1
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1
According to the first law of thermodynamics,
A)energy can be neither created nor destroyed
B)the total energy of the universe is constant
C)any change in the energy of a system is accompanied by an equal and opposite change in the energy of the surroundings
D)all of the above
2
An isolated system
A)allows energy and matter to be exchanged with its surroundings
B)allows energy only to be exchanged with its surroundings
C)is demonstrated by a reaction stoppered in an Erlenmeyer flask
D)is completely insulated from its surroundings
3
Which of the following is not true?
A)The Kelvin scale is a relative scale.
B)The Celsius scale is a relative scale.
C)0 K is the temperature at which a substance possesses no kinetic energy.
D)All of the above
4
Which of the following is not true?
A)Heat refers to the transfer of kinetic energy between objects with different temperatures.
B)Heat refers to the transfer of potential energy between objects with different temperatures.
C)Heat and energy are both measured in joules (J)
D)When a substance absorbs heat, the average speed of the particles in the substance increases.
5
Which of the following is true about specific heat capacity?
A)It relates the heat of a sample to a change in its temperature.
B)It is the energy required to raise the temperature of 1 g of a substance by 1°C.
C)It does not indicate the energy required to change the temperature of a substance.
D)It is the same for all substances.
6
A child's swimming pool contains 30 kg of water. On a hot sunny day, the temperature of the water rises from 20.0°C to 24.0°C. How much thermal energy does the water absorb? The specific heat capacity of water is 4.18 J/g°C
A)50 J
B)2.5 x 103 J
C)5.0 x 102 J
D)5.0 x 105 J
7
A concrete slab has a mass of 9.0 kg. If its initial temperature on a warm sunny day was 24°C and 72 kJ of thermal energy was released during the night, what would the final temperature be? The specific heat capacity of concrete is 0.88 J/g°C.
A)1.5°C
B)9.2°C
C)15°C
D)33°C
8
Which of the following is most true?
A)Different samples of water have different heat capacities.
B)The specific heat capacity of water is relatively small.
C)Heat capacity is usually expressed in units of kJ/kg
D)Specific heat capacity relates the heat of a given sample, object, or system to its change in temperature.





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