Question

A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If $\Delta H$ is the enthalpy change and $\Delta E$ is the change in internal energy, then

• A. $\Delta H>\Delta E$
• B. $\Delta H<\Delta E$
• C. $\Delta H=\Delta E$
• D. The relationship depends on the capacity of the vessel

Answer 1

The correct option is B $\Delta H<\Delta E$

$2CO\left(g\right)+O_2\left(g\right)\to 2C{O}_2\left(g\right)$
$\Delta n<0$
Hence, $\Delta H<\Delta E$