Chapter 6

Exercises

1. Because there would be no temperature difference between your hand and your head.

3. No. As the mercury expanded so would the glass tube, hence no change in the mercury level could be detected.

8. As the temperature of a gas increases, its KE increases, which means the molecules move faster. The faster moving molecules impact a greater force on the container as they strike it.

12. Any additional energy a molecule can absorb increases its specific heat capacity. Such materials would then have a higher specific heat capacity.

18. The glass tube will first experience the change in temperature. When the outside temperature goes up, the tube expands, then the mercury.

19. If the wire expands more than the glass, the glass will crack. If the glass expands more than the wire, a gap will form between the wire leads and the glass.

25. The cloth is meant to provide a surface that will allow water to evaporate. As the water evaporates, it cools the canteen.

28. The boiling removes (releases) any heat added to the water. That is, the evaporating water cools the water remaining in the pot.

30. The cooking of food is the result of it being exposed to a certain temperature. The food would then need to cook longer, thus not saving any energy.

35. Because water at 4 C will expand whether the temperature goes up or down.

37. It would get flipped upside down.

38. As the water freezes it will expand more than the pipes, thus bursting them.

40. More likely to freeze.

Problems

1. It would expand 50 cm.