Question

You have four water samples at different temperatures. In which sample are the molecules vibrating at the fastest speed?

A. Water at -15°C
B.Water at 37°C
C.Water at 78°C
D. Water at 94°C
E.None of the above.

Answer 1

The water at 94°C will have the fastest vibrating molecules because temperature directly correlates with molecular speed.

Among the given options, the water at 94°C will have molecules vibrating at the fastest speed. This is because the temperature of a substance is directly related to the average kinetic energy of its molecules. The higher the temperature, the faster the molecules move. Since 94°C is the highest temperature listed and well above freezing point, the kinetic energy of the water molecules will be greater than in the samples at lower temperatures.