Question: is n2 h2 nh3 exothermic?
Answer: The heat of formation of H2 ( g ) and N2( gas) under the standard condition is zero ( 0), and heat of formation of NH3 ( g ) is -46.11 kj / mol, so for the formation of 2 moles of NH3( g ) it would be - 92.22 kj, The -ve symbol is indicative of the above reaction is exothermic in nature.