Perfume sprayed from a bottle spreads more easily in a warm room of 25°C than in a cool room of 15°C. Which of the following correctly compares perfume molecules at 25°C to those at 15°C. Available options: I. At 25°C, they have more mass. II. At 25°C, they are moving faster. III. At 25°C, they have less kinetic energy. IV. At 25°C, they are decreasing in volume.
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