The propane fuel (C₃H₈) used in gas barbeques burns according to the thermochemical equation:

C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g); ΔH°_rxn = -2044 kJ

If a pork roast must absorb 1.6 x 10³ kJ to be fully cooked, and if only 10% of the heat produced by the barbeque is absorbed by the roast, what mass of CO₂ is emitted into the atmosphere during the grilling of the pork roast?