//ques-18.24 //Finding vapour pressure of benzene at 300 K clc Hv=7413;//latent heat of vapourization (in cal/mol) T1=273+80; T2=273+27;//temperature (in K) P1=760;//mm Hg R=1.987;//cal/mol/K //On solving, log(P2/P1) = (Hv*(T2-T1))/(2.303*R*T1*T2) P2=P1/6.467; printf("The required vapour pressure is %.2f mm Hg.",P2);