# Problem: The propane fuel (C3H8) used in gas barbecues burns according to the following thermochemical equation: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g); ΔH˚rxn= -2044 kJ. If a pork roast must absorb 1700 J to fully cook, and if only 13% of the heat produced by the barbecue is actually absorbed by the roast, what mass of CO2 is emitted into the atmosphere during the grilling of the pork roast?

###### FREE Expert Solution

We are asked what mass of CO2 is emitted into the atmosphere during the grilling of the pork roast.

We'll use the thermochemical equation to calculate the mass of CO2.

Molar mass CO2 = 44.01 g/mol

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g); ΔH˚rxn= -2044 kJ.

98% (230 ratings) ###### Problem Details
The propane fuel (C3H8) used in gas barbecues burns according to the following thermochemical equation: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g); ΔH˚rxn= -2044 kJ. If a pork roast must absorb 1700 J to fully cook, and if only 13% of the heat produced by the barbecue is actually absorbed by the roast, what mass of CO2 is emitted into the atmosphere during the grilling of the pork roast?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Thermochemical Equations concept. You can view video lessons to learn Thermochemical Equations. Or if you need more Thermochemical Equations practice, you can also practice Thermochemical Equations practice problems.