Question

п Chapter 7 "roblem 7.77 For the production of ammonia from its elements 3H2(g)+N2(g) AH 22 kcal/mol Part A 2NHs (g) Is this process endothermic or exothermic? O endothermic O exothermic Submit Request Answer Part B How many kilocalories are involved in the production of 0.650 mol of NHa? Express your answer using two significant figures. V AXd kcal Submit Request Answer Provide Feedback Type here to search

Answer 1

1)

Delta H is negative.

So, heat is released in reaction.

It is exothermic

Answer: exothermic

2)

When 2 mol of NH3 is formed, heat involved = 22 kcal

So,

When 0.650 mol of NH3 is formed, heat involved = 22*0.650/2 = 7.15 kcal

Answer: 7.15 kcal