If the bond energies of H $$-$$ H, Br $$-$$ Br, and H $$-$$ Br are 433, 192 and 364 kJ mol^$$-$$1 respectively, the $$\Delta $$H^o for the reaction

H_2(g) + Br_2(g) $$ \to $$ 2HBr_(g) is

Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are $$-$$ 382.64 kJ mol^$$-$$1 and $$-$$ 145.6 kJ mol^$$-$$1, respectively. Standard Gibb's energy change for the same reaction at 298 K is

Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is

What is the entropy change (in J K^$$-$$1 mol^$$-$$1) when one mole of ice is converted into water at 0^oC? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol^$$-$$1 at 0^oC).