Which of the following reactions is not exothermic?
- A$C_{(s)} + O_{2(g)} \to CO_{2(g)}$
- B$C_{(s)} + 2S_{(s)} \to CS_{2(g)}$
- C$CH_{4(g)} + 2O_{2(g)} \to CO_{2(g)} + 2H_2O_{(l)}$
- D$CO_{(g)} + \frac{1}{2}O_{2(g)} \to CO_{2(g)}$
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Heats of combustion $(\Delta H^o)$ for $C_{(s)}$,$H_{2(g)}$ and $CH_{4(g)}$ are $-94$,$-68$ and $-213 \ kcal/mol$ respectively. The value of $\Delta H^o$ for the reaction,$C_{(s)} + 2H_{2(g)} \to CH_{4(g)}$ is $..... \ kcal$.
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View SolutionThe heat evolved per mole of $H^+$ ions during the neutralization of a strong acid and a strong base is ......
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View SolutionWith the help of the following data,find out the change in heat content for the reaction in $kJ$:
$C_2H_{4(g)} + H_{2(g)} \to C_2H_{6(g)}$
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| Bond | Bond energy $(kJ \ mol^{-1})$ |
|---|---|
| $C-H$ | $413$ |
| $C-C$ | $348$ |
| $C=C$ | $610$ |
| $H-H$ | $436$ |
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