Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of time

Options

A. the pressure may increase or decrease depending upon the nature of the gas
B. the pressure remains the same
C. the pressure decreases
D. the pressure increases

Answer

C

Explanation

When the air in the cylinder is suddenly compressed, the temperature of the air is increased considerably. As time increases, heat from the system flows to the surrounding, and hence there is a decrease in temperature. Since the piston is kept in the same position, the volume remains constant. Hence `PpropT` at constant V.
`therefore` With decrease in temperature, the pressure is decreased.