Question

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

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

Answer 1

The correct option is A The pressure decreases

Due to compression the temperature of the system increases to a very high value. This causes the flow of heat from system to the surroundings, thus decreasing the temperature. This decrease in temperature results in decrease in pressure.