Question

1. Solid urea, (NH₂)₂CO, burns to give CO₂,N₂, and liquid H₂O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H₂O formed. (Enter in kJ.)

1B.Using this heat of combustion and the appropriate thermodynamic data, determine the heat of formation of urea. (Enter in kJ.)

2. Given that the ΔH^o_rxn = -2842.0 kJ, for the following reaction:

2C₃H₅(NO₃)₃(l) → 6CO₂(g) + 1/2O₂(g) + 3N₂(g) + 5H₂O(g)

determine the standard enthalpy of formation, ΔH^o_f, for: C₃H₅(NO₃)₃(l)(nitroglycerin). Enter in kJ/mol.

3a. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2SO₂(g) + O₂(g) → 2SO₃(g)

Enter in kJ.

3b. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2NO₂(g) → N₂O₄(g)

Enter in kJ.

Answer 1