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 $\Delta S$ is the change in internal energy, then.

• A. $\Delta H$
• B. $\Delta S$
• C. $mol^{- 1}$
• D. The relationship depends on the capacity of the vessel

Answer 1

Answer: (B)

$\Delta S$

Answer 2

Formation of $\Delta H = \Delta E$ from $\Delta H > \Delta E$ is an exothermic reaction; heat is evolved from the system, i.e., energy is lowered.

Thus, exothermic reactions occur spontaneously on account of decrease in enthapy of system. Thus, $\Delta H < \Delta E$.