Question

An ideal gas is enclosed in a sealed container. Upon heating, which property of the gas does not change?

• A. Volume
• B. Pressure
• C. The average speed of the molecules
• D. The rate of collisions of the molecules with each other
• E. The rate of collisions of the molecules with the walls of the container

Answer 1

The correct option is A Volume

Since the gas is in a closed container, its volume remains constant, so the correct answer is A . When the gas is heated, its temperature increases, meaning that the average speed of the gas molecules increases. An increase in temperature also means there are more collisions between molecules. According to the ideal gas law, when volume is constant and temperature is increased, then pressure will also increase. Pressure is determined by the rate of collisions of the gas molecules with the walls of the container.