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Calculate the Standard Enthalpy Change for the Combustion of Lactic Δ\Delta

Question 34

Multiple Choice

Calculate the standard enthalpy change for the combustion of lactic acid, C3H6O3.Given: Δ\Delta Hf° (lactic acid) = -671 kJ/mole; Δ\Delta Hf H2O = -242.83; CO2 = -393.5; O2 = 0 kJ/mol.( Δ\Delta Hrxn = Δ\Delta Hproducts - Δ\Delta Hreactants; Δ\Delta Hrxn = Bond broken - Bonds made)


A) 345 kJ/mol
B) -656 kJ/mol
C) 1238 kJ/mol
D) -1238 kJ/mol
E) -5346 kJ/mol

Correct Answer:

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