MCQ
The enthalpy of combustion of ${C_6}{H_{6(l)}}$ is $ -3250\, kJ$. When $0.39 \,g$ of benzene is burnt excess of oxygen in an open vessel, the amount of heat evolved is
- A$16.25\, J$
- ✓$16.25 \,kJ$
- C$32.5\, J$
- D$32.5\, kJ$
✓
Answer
Correct option: B.
$16.25 \,kJ$
(b)Heat evolved during combustion of $0.39\,g $ ${C_6}{H_6} = \frac{{3250 \times 0.39}}{{78}} = 16.25\,kJ.$
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