8. Thermochemistry
Thermochemical Equations
28PRACTICE PROBLEM
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?
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?