Consider the following reaction :- (a) `H_(aq)^(+)+CI_(aq)^(-)toHCI_(l),DeltaH=-X_(1) KJmol^(-1)` (b) `H_2(g)^(+)+CI_2(g)to2HCI_(l),DeltaH=-X_(2) KJmol^(-1)` ( c) `(1)/(2)H_(2(g))+(1)/(2)CI_(2(g))toHCI_(l),DeltaH=-X_(3) KJmol^(-1)`
(d) `H_((g))+CI_((g))toHCI_(l),DeltaH=-X_(4) KJmol^(-1)`
Enthalpy of formation of `HCI_(l)` is :-

Options

A. `-X_(1)Kjmol^(-1)`
B. `-X_(2)Kjmol^(-1)`
C. `-X_(3)Kjmol^(-1)`
D. `-X_(4)Kjmol^(-1)`

Answer

C