Chapter 9, Problem 9.63PAE

9.63 Reactions of hydrocarhons are often studied in the petroleum industry. One example is $2{\text{C}}_{\text{3}}{\text{H}}_{\text{8}}\left(\text{g}\right)\to {\text{C}}_{\text{6}}{\text{H}}_{\text{6}}\left(\mathcal{l}\right)+{\text{5H}}_{\text{2}}\left(\text{g}\right)$ , with $\Delta \text{H}°$ = 698 kJ. If 35 L of propane at 25C and 0.97 atm is to be reacted, how much heat must he supplied?