Hydrogen cyanide is used in the manufacture of clear plastics such as Plexiglas and Lucite. It is prepared from natural gas (CH4) and ammonia.
2NH3 (g) + 3O2 (g) + 2CH4 (g)→ 2HCN (g) + 6H2O (g)
The reaction evolves 939 kJ of heat per 2 mol HCN produced. Is the reaction endothermic or exothermic? Determine the value of q?