MCQ
Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?
- A$IF _{5}$
- B$SF _{4}$
- ✓$XeF _{2}$
- D$ClF _{3}$
$XeF _{2}$ has maximum $3$ lone-pair $-$ lone-pair repulsions
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$(I)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l);$
$\Delta {H^o_{298\,K}} = - 285.9\,kJ\,mo{l^{ - 1}}$
$(II)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g);$
$\Delta {H^o_{298\,K}} = - 241.8\,kJ\,mo{l^{ - 1}}$
The molar enthalpy of vapourisation of water will be.....$kJ\,mol^{-1}$
