Q.

When a gas in a cylinder is compressed at constant temperature by a piston, the pressure of the gas increases. Consider the following three statements.a) The rate at which the molecules collide with the piston increasesb) The average speed of the molecules increasesc) The molecules collide with each other more oftenWhich statement(s) correctly explain the increase in pressure?

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a

a only

b

b only

c

a and b only

d

a and c only

answer is A.

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Detailed Solution

As temperature is constant, the average speed of molecules remains constant. The pressure is not due to molecules colliding with each other but colliding with the piston
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When a gas in a cylinder is compressed at constant temperature by a piston, the pressure of the gas increases. Consider the following three statements.a) The rate at which the molecules collide with the piston increasesb) The average speed of the molecules increasesc) The molecules collide with each other more oftenWhich statement(s) correctly explain the increase in pressure?