Answer: Increasing temperature.
- A Decreasing temperature
- B Increasing temperature
- C Increasing surface tension
- D Increasing viscosity
Correct answer: B. Increasing temperature
Explanation: As temperature rises, more molecules gain enough energy to escape into the vapour phase, increasing vapour pressure.
Boyle's law: at constant temperature the pressure of a fixed mass of gas is inversely proportional to its volume (P ∝ 1/V), so the P–V plot is a hyperbola — halving the volume doubles the pressure. Image: Reginaprice2013, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Discover why gases expand to fill any container while liquids flow and solids hold their shape. Master the gas laws, the ideal gas equation, and the reasons real gases deviate from ideal behavior.