The bond dissociation enthalpy of X_2 H^ _ bond calculated from the given data is _____ kJ mol^ -1 . (Nearest...

Question

The bond dissociation enthalpy of X_2 H^ _ bond calculated from the given data is _____ kJ mol^ -1 . (Nearest integer) M^+X^-(s) M^+(g) + X^-(g) H^ _ lattice = 800 kJ mol^ -1 M(s) M(g) H^ _ sub = 100 kJ mol^ -1 M(g) M^+(g) + e^-(g) H^ _i = 500 kJ mol^ -1 X(g) + e^-(g) X^-(g) H^ _ eg = –300 kJ mol^ -1 M(s) + 1 2 X_2(g) M^+X^-(s) H^ _f = –400 kJ mol^ -1 [Given : M^+X^- is a pure ionic compound and X forms a diatomic molecule X_2 is gaseous state]

Accepted Answer

200

JEE Main 2025 Chemistry question

Solution