14.1 Heat
Energy in transit because of a temperature difference, the calorie and the joule, and the mechanical equivalent linking the two.
2 exercises
14.1 Exercise 1
Heat added or removed from a system changes its internal energy and thus its temperature. Such a temperature increase is observed while cooking. However, adding heat does not necessarily increase the temperature. An example is melting of ice; that is, when a substance changes from one phase to another. Work done on the system or by the system can also change the internal energy of the system. Joul…
14.1 Exercise 2
An ice cube is placed in a cup of hot water. Which of the following statements correctly describes energy transfer at the molecular level?
- Kinetic energy is transferred only from the hot water molecules to the water molecules in the ice.
- Kinetic energy is transferred only from the water molecules in the ice to the hot water molecules.
- Kinetic energy is transferred mostly from the hot water molecu…
Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.