0.4%

This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.

## What factors affects the kinetic energy of an object?

1. Explain that there are two factors that affect how much kinetic energy a moving object will have: mass and speed.

## Is kinetic energy is directly proportional to pressure?

Therefore, we can conclude that the average kinetic energy of the molecules is directly proportional to the temperature of the gas and is independent of pressure, volume or the nature of the gas. This fundamental result thus relates the temperature of the gas to the average kinetic energy of a molecule.

## Why is temperature average kinetic energy?

Kinetic energy is proportional to the speed of the molecules. As the speed of the colliding molecules increases, so does the total kinetic energy of all the gas molecules. Instead, temperature can be used as a measure of the average kinetic energy of all the molecules in the gas.

## In what temperature of water will its molecules have the highest kinetic energy?

Water’s heat of vaporization is around 540 cal/g at 100 °C, water’s boiling point. Note that some molecules of water – ones that happen to have high kinetic energy – will escape from the surface of the water even at lower temperatures.

## In which sample do molecules have the greatest average kinetic energy?

Temperature is the average kinetic energy of the sample that we take, so the highest temperature indicates the greatest average kinetic energy.

## How does the average kinetic energy of molecules of the substance change?

During a phase change, temperature of the substance remains the same. Average kinetic energy of the molecules of the substance does not change during phase change but average potential energy changes.

Temperature