ThermochemistryHard

Question

For the reaction C(s) + ½ O2(g) → CO(g),

Options

A.ΔH > ΔE
B.ΔH < ΔE
C.ΔH = ΔE
D.|ΔH| > |ΔE|

Solution

$\Delta n_{g} = 1 - \frac{1}{2} = \frac{1}{2}$

$\Delta H = \Delta E + \Delta n_{g}RT\text{ and }\Delta H,\Delta E\text{ are} - ve\text{, hence }\Delta H < \Delta E.$

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