For the following questions, circle the one best answer. No explanation is requi

Question

For the following questions, circle the one best answer. No explanation is required, but partial credit may be given for explanations if provided 1. (6 pts) Complete the following statement: The term heat most accurately describes a) b) c) d) e) the molecular motion inside of an object. the internal energy of an object. a measure of how hot an object is. the absolute temperature of an object. the flow of energy due to a temperature difference 2. (S pts) A refrigerator: a) b) c) d) converts heat input to an equivalent amount of work converts work to an equivalent amount of heat takes heat in, does work, and loses energy as heat uses work done on the system to transfer heat from a low temperature reservoir to a high temperature reservoir uses work done on the system to transfer heat from a high temperature reservoir to a low temperature reservoir. e) (Hint: What 3. (5 pts) During an isobaric expansion, the internal energy of the gas must happens to the temperature?) a) increase b) decrease c) stay constant d) there is not enough information here to say 4. (9 pts) A fixed amount of ideal gas goes through a complete cycle as pictured on the PV diagrarm below. What are the signs of the work done, the change in the internal energy, and the heat exchanged with the environment for the complete cycle? (Write +, -, or 0 in each blank, no calculations are needed!) 7.0× 105 The work is The heat flow is The change in internal energy is 3.0x 105 5. (7 pts) When a sample of a typical material is heated... a) its volume increases b) its volume decreases c) its weight increases d) its weight decreases e) both a and c f) both b and d 2.0× 10 5.0× 10-3 Volume, m3 therefore the density of that materia!... a) Increases b) Decreases c) Remains unchanged

Explanation / Answer

1) The term heat most accurately describes

(e) The flow of heat due to a temperature difference.

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