If a gas expended at constant temperature

Options

A. The pressure decreases
B. The kinetic energy of the molecules remains the same
C. The kinetic energy of the molecules decreases
D. The number of molecules of the gas increases

Answer

AB

Explanation

At Constant temperature, the Kinetic energy of the molecules remains the same, but the pressure decreases. When a gas is expanded at constant temperature, then the kinetic energy of the molecules remain the same, but the pressure decreases because `P prop (1)/(V)`