Question

The propane fuel {\rm{(C}}_3 {\rm{H}}_8 ) used in gas barbeques burns according to the following thermochemical equation:\begin{array}{l} {\rm{C}}_3 {\rm{H}}_8 (g)\; + \;5{\rm{ O}}_2 (g)\; \rightarrow \;3{\rm{ CO}}_2 (g)\; + \;4{\rm{ H}}_2 {\rm{O(}}g) \\ {\rm{ }}\Delta {\kern 1pt} H_{{\rm{rxn}}}^\circ = - 2217{\rm{ kJ}} \\ \end{array} If a pork roast must absorb 1500kJ to fully cook, and if only 14% of the heat produced by the barbeque is actually absorbed by the roast, what mass of {\rm{CO}}_2 is emitted into the atmosphere during the grilling of the pork roast?Express your answer using two significant figures.