The heat of formation of H2O(l) is -286 kJ. The· heat of formation of H2O(g) is likely to be

Question

The heat of formation of H2O(l) is -286 kJ. The· heat of formation of H2O(g) is likely to be (A) - 286 kJ (B) +286 kJ (C) - 341 kJ (D) - 242.8 kJ

Tardigrade Admin · Accepted Answer

The enthalpy of H2O(l) is less than that of H2O(g), hence more energy will be released when H2O(l) is formed. ⇒ Δ Hf H2O(g) < Δ Hf H2O(l)

Q. The heat of formation of $H_{2} O_{(l)}$ is $- 286 k J$ . The· heat of formation of $H_{2} O_{(g)}$ is likely to be