Calculate heat of the following reaction at constant pressure, F2O(g) + H2O(g) ® O2 (g) + 2HF(g) The heats of formation of F2O (g), H2O(g) and HF (g) are 5.5 kcal, –57.8kcal and 64.2 kcal respectively.
(A) -76.5 Kcal
(B) -11.9 Kcal
(C) -71.6 Kcal
(D) -91.1 Kcal