MCQ
Maximum number of electrons in a subshell of an atom is determined by the following
- A$2l + 1$
- B$4l - 2$
- C$2n^2$
- ✓$4l + 2$
$\therefore$ Maximum number of electrons in the subshell $=2(2l+1)=4l+2$
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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.....$kJ\,mol^{-1}$