Question

Which of the following phase changes involves a gas turning into a liquid? (1 point)
• Condensation
• Boiling
• Sublimation
• Freezing
If you keep a gas's temperature constant, how would you increase the volume of the gas? (1 point)
• You would change the temperature
• You would increase the pressure
O You would decrease the temperature
• You would decrease the pressure
Of five different laboratory solutions, the solution with the highest acidity has a pH of (1 point)
12
• 11
• 3
0 5
7

Answer 1

1) Condensation — gas → liquid.

2) You would decrease the pressure — at constant temperature (PV = nRT) lowering pressure increases volume.

3) pH 3 — lower pH = higher acidity.