the standard enthalpy of formation of ICl(g) is

Question

A scientist measures the standard enthalpy change for the following reaction to be -25.6 kJ :

I2(g) + Cl2(g)2ICl(g)

Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of ICl(g) is_______kJ/mol

Answer 1

I₂(g) + Cl₂(g) ==> 2ICl(g)  ∆H = -25.6 kJ

∆H_f ICl - ∆H_f I₂ + ∆H_fCl₂ = -25.6 kJ

∆Hf ICI - 0 + 0 = -25.6 kJ

∆Hf ICl = -25.6 kJ/2