Question

A gas occupies 200 cm3 at 300k and 1.5x10^5 pressure. What is the volume of the gas at S.T.P

Answer 1

 Gas has a volume V1 =200cm3, at a temperature T1=300K and at a pressure P1=150000pa.

At STP temperature T2 =273.15K, the pressure P2=101325pa and the volume V2 is given by;

$P1V1/T1=P2V2/T2$

Hence $V2= P1V1T2/P2T1$

               V2=150000*200*273.15/101325*300

                V2=269.59cm3