The relationship between temperature and volume Charles's Law The relationship between temperature and volume

How Volume Varies With Temperature If we place a balloon in liquid nitrogen it shrinks: So, gases shrink if cooled.

How Volume Varies With Temperature Conversely, if we heat a gas it expands (as in a hot air balloon).

Check Your Understanding: If the sun shining through windows heats the air in a sealed room, what happens to the air pressure in that room? a It decreases. b It will vary. C It increases. d It remains constant.

Temperature vs. Volume Graph 5 10 15 20 25 30 Volume (mL) 25 mL at 22C 31.6 mL, 23.1 mL Y=0.0847x + 23.137 Temperature (C) 100

Check Your Understanding: At constant pressure, how are the temperature and volume of a gas related? a They are inversely proportional. b They are directly proportional. C They are constant. d They are indirectly proportional.

Charles’s Law

When the temperature of a gas at a constant pressure is increased, its volume increases At constant pressure, when the temperature of a gas is increased, what happens to its volume T = P = C V =

When the temperature of a gas at a constant pressure is decreased, its volume decreases At constant pressure, when the temperature of a gas is decreased, what happens to its volume T = P = C V =

Check Your Understanding: At constant pressure, when the temperature of a gas is decreased, what happens to its volume? a It decreases. b It will vary. C It increases. d It remains constant.

BOYLE’S LAW The relationship between pressure and volume

When the pressure of a gas at a constant temperature is increased, the volume of the gas decreases If the temperature of a gas is constant, when the pressure is increased, the volume decreases T= C P= V=

When the pressure of a gas at a constant temperature is decreased, the volume of the gas increases If the temperature of a gas is constant, when the pressure is decreased, the volume increases T= C P= V=

T and P pg 65 no name…lets call it Sheffer’s Law V =C Directly Proportional

Directly Proportional V and T pg 66 Charles’s Law T = P = C V = Directly Proportional

Inversely Proportional P and V pg 67 Boyle’s Laww T = C P = V = Inversely Proportional

Solids, Liquids, and Gases Chapter 2 Study Guide A 1. B 7. C 2. C 8. C 3. A 9. B 4. D 10. C 5. C 6. B

Solids, Liquids, and Gases Chapter 2 Study Guide A 11. gas 18, F freezing 12. thermal 19. F sublimation 13. gas 20. T 14. viscosity 15. Boiling 16. F, more freely than 17. F, amorphous