Hess's Law: JEE Questions & Solutions

If the enthalpy of sublimation of Li is 155 kJ mol^-1, enthalpy of dissociation of F2 is 150 kJ mol^-1, ionization enthalpy of Li is 520 kJ…

Consider the following cases of standard enthalpy of reaction ( Hf^ in kJ mol^-1): C2 H6(g) + 7 O2(g) 2 CO2(g) + 3 H2 O(l) H1^ = -1550…

The heat of formation of SO2(g) is given by: S(g) + 32 O2(g) SO3(g) + 2x kcal SO2(g) + 12 O2(g) SO3(g) + y kcal

If C( diamond) C( graphite) + X kJ mol^-1 C( diamond) + O2(g) CO(g) + Y kJ mol^-1 C( graphite) + O2(g) CO(g) + Z kJ mol^-1 At constant…

Two reactions are given below: 2 Fe^3+ + 3 O2 (g) Fe2 O3 (s), Hf = -822 kJ/mol C (g) + 12 O2 (g) CO (g), Hf = -110 kJ/mol Enthalpy change…

The enthalpy change for the conversion of 12 Cl2(g) Cl^-(aq) is (-)..... kJ mol^-1 (Nearest integer) Given: fH^ (Cl2(g)) = 240 kJ mol^-1,…

At 25^ C, the enthalpy of the following processes are given: H2(g) + O2(g) 2OH(g) H^ = 78 kJ mol^-1 H2(g) + 12 O2(g) H2O(g) H^ = -242 kJ…

Consider the following data: Heat of combustion of H2(g) = -241.8 kJ mol^-1 Heat of combustion of C(s) = -393.5 kJ mol^-1 Heat of…

The H^ for the reaction C( graphite) + 12O2( g) CO( g) is: