During a humid day, water vapor in the air condenses onto the cold surface of a beverage glass, forming liquid water droplets without any change in temperature.
Which statement correctly describes the change in the energy of the water molecules during this condensation process?
Both potential and kinetic energies decrease.
Only kinetic energy decreases.
Only potential energy decreases.
Only potential energy increases.
56 exam-style questions on OCR A A Level Physics Thermal physics, covering Temperature, Solid, liquid and gas, Thermal properties of materials, and Ideal gases. Each one has a worked solution and a mark scheme showing where the marks go.