| Calculate \[\Delta {{H}^{o}}\] for evaporation of \[{{H}_{2}}O(l)\] |
| \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\xrightarrow{\,}\,{{H}_{2}}O(l);\Delta H=285.77\,\,kJ\] ?(i) |
| \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\xrightarrow{\,}\,{{H}_{2}}O(g);\,\Delta H=241.84\,\,kJ\]?(ii) |
A) + 43.93 kJ
B) - 43.93 kJ
C) 527.61 kJ
D) - 527.61 kJ
Correct Answer: B
Solution :
[b] Subtract Eq. (i) from (ii) to get \[{{H}_{2}}O\,(l)\xrightarrow{\,}\,{{H}_{2}}O\,(g)\] \[-\,285.77+241.84=-\text{ }43.93\]
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