Question

If a pork roast must absorb 1500kJ to fully cook, and if only 11% 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. The propane fuel (C3H8) used in gas barbeques burns according to the following thermochemical equation: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g)ΔH∘rxn=−2044kJ

Answer 1

Comment in case of any doubt.

Heat to be produced x 11 - 1500 kJ 1 oo KJ Do =) Heat to be produced = 1500 KJ X 100 = 13636.364 KI 2044 kJ of heat is released per 3 mol of co produced. So, for producing 13636.364k5 of heat, amount of cą produced = 3 malco 2004 kJ heat 13636.364 KJ heat 20.01 48 tual , molar mass of co 20-0142 04/ , xu 8 , = 380.63 g co2 = 0.88 kg coz Answer (0.88 kg CO