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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Which of the following reaction defines $\Delta H_c^ \circ $
  • A
    $H_2(g) + \frac{1}{2} O_2(g) \rightarrow H_2O(g)$
  • B
    $N_2(g) + 3H_2(g) \rightarrow  2NH_3(g)$
  • C
    $C_{diamond} + O_2(g) \rightarrow  CO_2(g)$
  • ✓
    $H_2(g) + \frac{1}{2} O_2(g) \rightarrow H_2O(l)$
✓

Answer

Correct option: D.
$H_2(g) + \frac{1}{2} O_2(g) \rightarrow H_2O(l)$
d

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