Question

An ideal gas is enclosed in a container of volume V at pressure P.It is being pumped out of the container by using a pump with stroke volume V' . What is final pressure in container after n-stroke of the pump ?(assume temperature remains same)

Answer 1

Answer on Question 42744, Physics, Molecular Physics | Thermodynamics

Before doing n strokes, the parameters of the system were $P, V$. After doing n strokes, parameters became $V - nV', P_1$, where $P_1$ is unknown.

Let us use ideal gas equation $PV = \nu RT$. Since the temperature is constant, $PV = \text{const}$.

Thus, $PV = P_{1}(V - nV')$, from where $P_{1} = \frac{PV}{V - nV'}$ - this is the final pressure after n-stroke.

http://www.AssignmentExpert.com/