Question

If you fill up a balloon with a small amount of air, then set it in direct sunlight, you will see that the balloon expands. This expansion is due to an increase in volume, which results from an increase in the temperature of the air in the balloon. This increase in temperature increases the ______________ of the gas, which results in the gas particles moving faster and colliding more often with the wall of the container. These collisions are what increase the pressure of the gas on the balloon, and ultimately cause the balloon to stretch out.

Answer 1

According to Charle's law the volume of an ideal gas is directly proportional to temperature of gas

If we increase temperature of a gas the volume of gas will increase

The increase in temperature increases the kinetic energy of gas molecules, The kinetic energy is directly proportional to temperature as:

K.E = 3/2 (KT)

Where

K = constant

T = temperature

Thus yes due to increase in kinetic energy the collision of gas molecules increases and pressure increases.

Answer 2

I just did guessed on the question and got it right. The answer is kinetic energy.