1. Third law of thermodynamics provides a method to evaluate which property?
2. One mole of which of the following has the highest entropy?
3. The enthalpy of vaporisation of a substance is 8400 J mol
4. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is
5. In a reversible process the system absorbs 600 kJ heat and performs 250 kJ work on the surroundings. What is the increase in the internal energy of the system?
6. Which of the following is true for the reaction? H
7. Calculate the heat required to make 6.4 Kg CaC2 from CaO(s) and C(s) from the reaction: CaO(s) + 3 C(s) → CaC2(s) + CO (g) given that ∆f Ho (CaC2) = -14.2 kcal. ∆f H° (CO) = -26.4 kcal.
8. In a system where ∆E = -51. 0 kJ, a piston expanded against a p
9. A system absorb 10 kJ of heat at constant volume and its temperature rises from 270 C to 370 C. The value of ∆ U is
10. An ideal gas is taken around the cycle ABCA as shown in P-V diagram The next work done by the gas during the cycle is equal to: