N2(g) + 3 H2(g) → 2 NH3(g) ΔH= -91.8 kJ Determine ΔH for:

4 NH3(g) → 2 N2(g) + 6 H2(g)

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?