Question

The enthalpy changes for the following processes are listed below :
$Cl_2(g) \rightarrow 2Cl(g)$, 242.3 kJ mol⁻¹
$I_2(g) \rightarrow 2I(g)$, 151.0 kJ mol⁻¹
$ICl(g) \rightarrow I(g) + Cl(g)$, 211.3 kJ mol⁻¹
$I_2(s) \rightarrow I_2(g)$, 62.76 kJ mol⁻¹
Given that the standard states for iodine and chlorine are I₂(s) and Cl₂(g), the standard enthalpy of formation for ICl(g) is :
(a) +16.8 kJ mol⁻¹
(b) +244.8 kJ mol⁻¹
(c) –14.6 kJ mol⁻¹
(d) –16.8 kJ mol⁻¹

Answer 1

(a) part is the correct option