Question

Heat of combustion $\Delta E$ of $\Delta H > \Delta E$ and $\Delta H < \Delta E$ gases are – 212.8, – 373.0, – 337.0 and – 310.5 kcal respectively at the same temperature. The best fuel among these gases is.

• A. $\Delta H = \Delta E$
• B. $\Delta E$
• C. $\Delta H$
• D. $\Delta H = \Delta E - P\Delta V$

Answer 1

Answer: (A)

$\Delta H = \Delta E$

Answer 2

$\Delta W = 0$ is the best fuel because its calorific value $\Delta Q = 0$ is higher among the other gases.