O-LevelPhysicsThermal Physics5054/12 · May/June 2022 · Q201 Mark
Steam at 110°C condenses on a surface to form water droplets at 100 °C. What happens after the steam comes into contact with the surface?
AThe molecules slow down and absorb energy from the surroundings.
BThe molecules slow down and emit energy to the surroundings.
CThe molecules stay at the same speed and absorb energy from the surroundings.
DThe molecules stay at the same speed and emit energy to the surroundings.
✓ Correct answer
B: The molecules slow down and emit energy to the surroundings.
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