MCQ
Enthalpies of formation of $CCl _{4( g )}, H _2 O_{( g )}, CO _{2( g )}$ and

$HCl_{ ( g )}$ are $-105,-242,-394$ and $-92\,kJ\,mol ^{-1}$

respectively. The magnitude of enthalpy of the reaction given below is $......kJ\,mol ^{-1}$

(nearest integer) $CCl _{4( g )}+2 H _2 O_{( g )} \rightarrow CO _{2( g )}+4 HCl_{( g )}$

  • A
    $172$
  • B
    $174$
  • $173$
  • D
    $176$

Answer

Correct option: C.
$173$
c
$\Delta_{ r } H =\sum H _{ p }-\sum H _{ R }$

$=(-394+4 \times-92)-(-105+(2 \times-242))$

$=-173\,kJ / mol$

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