The combustion of one mole of benzene takes place at 298 K and 1 atm. After combustion, CO2(g) and H2O are produced and 3267.0 kJ of heat is liberated. Calculate the standard enthalpy of formation of benzene. Standard enthalpies of formation of CO2(g) and H2O(l) are −393.5 kJ mol−1 and −285.83 kJ mol−1 respectively.
a. Give relationship between enthalpy change, entropy change and Gibb's free energy change.
b. For a reaction ΔH and ΔS are positive. What is the condition that this reaction occurs spontaneously?
(OR) State Hess's law.
(OR) Discuss the effect of temperature on the spontaneity of a reaction using Gibbs free energy.
(1) Give relationship between enthalpy change, entropy change and Gibb's free energy change.
(2) For a reaction ΔH and ΔS are positive. What is the condition that this reaction occurs spontaneously?
(3) (OR) State Hess's law.
(4) (OR) Discuss the effect of temperature on the spontaneity of a reaction using Gibbs free energy.