6 20 When 2g of benzene are burnt in a bomb calorimeter the

Last updated: 6/27/2023

6 20 When 2g of benzene are burnt in a bomb calorimeter the heat produced is 83 6 kJ at 298 K Calculate the enthalpy of combustion of benzene Ans 3264 1 kJ mol 6 21 The enthalpy change AH of the reaction at 298 K C H5OH 302 g 2CO g 3H O l reaction 3 is found to be 326 7 K cal Calculate AE for the given Ans AE 326 1 kcal 6 22 400 cm of a gas are compressed to half of its volume by applying a pressure of 0 5 atm During the process 6 5 J of heat flows out to the surroundings Calculate AE of the system Ans 3 63 J 6 23 Calculate the work done w and internal energy change AE when one mole of water at 100 C vaporises against an atmospheric pressure of 1 atm assuming ideal gas behaviour Heat of vaporisation of water at 100 C is 1020 cal mol Ans 740 9 cal 279 1 call 6 24 Calculate the work done in calories when 5 moles of an ideal gas are compressed isothermally and reversibly from a pressure of 1 5 atm to 15 atm at