Write the chemical equation for the standard molar enthalpy of formation of ammonium nitrate, NH4NO3 2.

1.Write the chemical equation for the standard molar enthalpy of formation of ammonium nitrate, NH4NO3

2. The standard heat of forrmation of acetylene cannot be measured directly but can be determined indirectly from other heats of reaction by applying Hess's Law. Given the following data for the combustion of carbon, hydrogen, and acetylene, C2H2, in oxygen:

C (s) + O2 (g) → CO2 (g)

∆ H = -393.5 kJ

∆ H = -285.8 kJ

∆ H = -1.296 x 103 kJ

H2 (g) + 1/2 O2 (g) →C2H2 + 21/2 O2 (g) →

H2O (l)

2 CO2 (g) + H2O (l)

Calculate the standard heat of formation of acetylene.