Define enthalpy of combustion.

In the reaction ${\mathrm{CO}}_{\left(\mathrm{g}\right)}+\frac{1}{2}{\mathrm{O}}_{2\left(\mathrm{g}\right)}= {\mathrm{CO}}_{2\left(\mathrm{g}\right)}$ at constant $\mathrm{T}$ and $\mathrm{P}$ which one of the following in correct ?

(i) $∆\mathrm{H}=∆\mathrm{E}$

(ii) $∆\mathrm{H}>∆\mathrm{E}$

(iii) $∆\mathrm{H}<∆\mathrm{E}$

Define Hess's law.

In which type of reaction heat is absorbed ?

The dissociation energy of ${\mathrm{CH}}_4$ is $360 \mathrm{kcals}/\mathrm{mole}.$ What is the energy associated with $\mathrm{C}-\mathrm{H}$ bond ?

What is bond energy?

Define heat of combustion.

Write the equation relating free energy, entropy and enthalpy.