1. calculate the work done when 1.0mol. of water at 100deg.cent. vapourises against an atmospheric pressure of 1 atm. Assume ideal behaviour and volume of liquid water to be negligible.
2. A gas is expanded from 300cubic cm to 500 against an average pressure of 760mm Hg At the same time 2J heat has been also supplied to the system. Calculate the change in internal energy.
3. Calclate the difference between heats of reaction at constant pressure and constant volume for the reaction at 25 deg.C in KJ
4.The heat of combustion of benzene at constant volume was found tobe 326.9KJ/mol. at 25deg.C. Calculate the heat of combustion of benzene in KJ at constant pressure.
2006-09-29 17:11:31 · 1 answers · asked by sunitha nkumar 1 in Science & Mathematics ➔ Chemistry
1.) W = P(V1-V2)
2) change in U = 2 - 760(500-300) (convert to Joules)
3) Which reaction ?????????
4) At constant pressure = -326.9 + (6-15/2)*8.314*298
2006-09-29 21:15:29 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋