Question

Ammonia reacts with fluorine gas according to the thermochemical equation given

below. Calculate the heat transferred, in kJ, when 34.0g of ammonia reacts with 190.0g
of fluorine. Will this heat be released or absorbed? Briefly explain your reasoning.
NH3 (g) + 3F2 (g) → NF3 (g) +3HF (g)
AH°rxn = -881.2 kJ

Answer 1

Heat transferred is already given in the question

• ∆H_rxn=-881.2kJ
• As ∆H is negative
• The reaction is endothermic and 881.2kJ of heat is absorbed .