?Ammonia (NH3) boils at -33 °C; at this temperature it has a density of 0.81 g/cm3. The
Chapter 5, Problem 5.113(choose chapter or problem)
Ammonia (NH3) boils at -33 °C; at this temperature it has a density of 0.81 g/cm3. The enthalpy of formation of NH31g2 is -46.2 kJ/mol, and the enthalpy of vaporization of NH3(l) is 23.2 kJ>mol. Calculate the enthalpy change when 1 L of liquid NH3 is burned in air to give N2(g) and H2O(g). How does this compare with ΔH for the complete combustion of 1 L of liquid methanol, CH3OH(l)? For CH3OH(l), the density at 25 °C is 0.792 g/cm3, and ΔHf° = -239 kJ/mol.
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