Question

A gas is allowed to expand at constant temperature from an initial volume of 10
ml to a final volume of 300 ml. At the end of the expansion, the pressure of the
gas was found to be 1 atmosphere. What was the initial pressure of the gas?

Answer 1

P1V1=P2V2
$p1 \times 10 = 1 \times 300 \\ p1 = 30atm$