Chapter 9, Problem 57E

The propane fuel (C₃H₈) used in gas barbeques bums according to a thermochemical equation
${\text{C}}_{\text{3}}{\text{H}}_{\text{8}}\left(\text{g}\right){\text{+5 O}}_{\text{2}}\left(\text{g}\right)\to {\text{3 CO}}_{\text{2}}\left(\text{g}\right){\text{+4 H}}_{\text{2}}\text{O}\left(\text{g}\right)\Delta {\text{H}}_{\text{rxn}}^{\text{o}}\text{= }-\text{2217 kJ}$
If a pork roast must absorb $1.6\times {10}^3\text{ kJ}$ to fully cook, and if only 10% of the heat produced by the barbeque is actually absorbed by the roast, what mass of CO₂ is emitted into the atmosphere during the grilling of the pork roast?