Problem: Consider the combustion of propane:C3H8 + 5O2 → 3CO2 + 4H2O           ΔH = -2221 kJAssume that all the heat in Example 7‑3 comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?

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Consider the combustion of propane:

C3H8 + 5O2 → 3CO2 + 4H2O           ΔH = -2221 kJ

Assume that all the heat in Example 7‑3 comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?