Chapter 6, Problem 115RQ

For ethanol, ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$, which is mixed with gasoline to make the fuel gasohol, $\Delta H_{\text{f}}^{\text{°}}=-277.63\text{ kJ/mol}\text{.}$

Calculate the number of kilojoules released when 1.25 gallons of ethanol is burned completely. The density of ethanol is $\text{0}{\text{.787 g cm}}^{\text{-3}}$. Use the data in Table 6.2 to help in the computation.