The propane fuel (C3H8) used in gas barbeques burns according to the following thermochemical equation:C3H8(g)+5O2(g)?3CO2(g)+4H2 O(g)?H?rxn=?2217kJ If a pork roast must absorb 1.7×103 kJ to fully cook, and if only 14 % 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?
Express your answer using two significant figures. m=g