Question
Question: Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position....
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
The pressure decreases
Explanation
Solution
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.