Annie Termaat and Christopher Talbot Solutions for Chapter: How Can Our Energy Resources Be Accessed Fairly?, Exercise 18: ACTIVITY: Calculating enthalpy changes (ΔH) using bond energy tables

If in a chemical reaction, $∆\mathrm{H}$ is positive, state the type of reaction involved.

If in a chemical reaction, $∆\mathrm{H}$ is positive, outline the source of this thermal energy, in terms of bonds of the chemical reactants and products.

Calculate, using the information in the table, the enthalpy of combustion of ethanol.

Calculate, using the information in the table, the enthalpy of combustion of octane $\left({\mathrm{C}}_8{\mathrm{H}}_{18}\right)$, a major component of petrol.

Calculate the energy released when $0.50$ mole of methane is burnt.

When $10 \mathrm{g}$ of methane is burnt in oxygen, the heat evolved is $560 \mathrm{kJ}$. What is the heat of combustion (in $\mathrm{kJ} {\mathrm{mol}}^{-1}$) of methane?

Calculate the energy released (heat produced) when $32.10 \mathrm{g}$ of methane is burnt.

If a chemical reaction $∆\mathrm{H}$ is positive: state the type of chemical reaction involved.