Question

Assuming compression is according to the law pV = constant. Calculate the initial volume of gas at a pressure of 2 bar which will occupy a volume of 6 cubic meters when it is compressed to a pressure of 42 bar.                                                                                                                        

Answer 1

PV=constant

$P_1V_1=P_2V_2\\V_1=\frac{P_2V_2}{P_1}$

Put values

$V_1=\frac{6\times42}{2}=126m^3$