Question

A gas is enclosed in a vessel at a constant temperature at a pressure of 2.5 atmospheres and a volume of 4 litres. Due to a leak in the vessel, after some time the pressure is reduced to 2 atmospheres. As a result –

• A. 20% of the gas remains in the vessel
• B. 20% of the gas escapes out
• C. 25% of the gas escapes out
• D. 25% of the gas remains in the vessel.

Answer 1

Answer: (B)

20% of the gas escapes out

Answer 2

PV = nRT = $\frac{m'}{M}$ RT