How are internal energy change, free energy change and entropy change are related to one another?

 How is entropy of a substance related to temperature?

Define intensive properties.

What is Gibbs Helmholtz equation?

What are the units of entropy?

hat is a spontaneous change? Give one example.

 When liquid benzene is oxidised at constant pressure at 300 K, the change in enthalpy is -3728 kJ. What is the change in internal energy at the same temperature?

The enthalpy of formation of methane at constant pressure and 300 K is – 78.84 kJ. What will be the enthalpy of formation at constant volume?

Calculate the enthalpy change for the reaction: H₂(g) + Cl₂(g) ————-> 2HCl(g). Given that bond energies ofH-H, Cl- Cl and H-Cl bonds are 433, 244 and 431 kj mol^-1 respectively.

 The bond enthalpy of H2(g) is 436 kj mol^-1and that of N2 (g) is 941.3 kj mol^-1. Calculate the average bond enthalpy of an N-H bond in ammonia. Given: ∆H^– (NH₃) = -46 kj mol^-1

When two moles of C₂H₆(g) are burnt, 3129 kj of heat is liberated. Calculate the heat of formation of C₂H₆(g). ∆_fH for C0₂(g) and H₂0(l) are-393.5 and -286 kj mol^-1 respectively.