What is the heat released if 5.0g of C3H8 reacts completely with oxygen?

Question

C3H8+5O2->3CO2+4H2O+488kJ

Answer 1

We will use dimensional analysis where we cancel out units using relationships within the equation and conversion.

5.0 g C₃H₈ (1 mol/ 44 g C₃H₈ ) x 488 kJ/1 mol C₃H₈ = 55.45 kJ

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