# How much heat is released when a mixture containing 10.0 g NH 3 and 20.0 g O 2 reacts by the following equation? 4 NH 3 ( g ) + 5 O 2 ( g ) → 4 NO ( g ) + 6 H 2 O ( g ) ; Δ H ° = − 906 kJ

### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343

Chapter
Section

### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343
Chapter 6, Problem 6.155QP
Textbook Problem
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## How much heat is released when a mixture containing 10.0 g NH3 and 20.0 g O2 reacts by the following equation? 4 NH 3 ( g ) + 5 O 2 ( g ) → 4 NO ( g ) + 6 H 2 O ( g ) ; Δ H ° = − 906   kJ

Interpretation Introduction

Interpretation:

Amount of heat released when mixture having 10g  Ammonia and 20g Oxygen reacted has to be determined.

### Explanation of Solution

Given

For given reaction ΔH° = -906 kJ

Amount of ammonia in a mixture = 10g

Amount of Oxygen in a mixture = 20g

Given reaction is,4NH3(g) + 5O2(g)4NO(g) + 6H2O(g);ΔH° = -906 kJ

First we have to calculate the limiting reactant by calculating the moles of ammonia and Oxygen. After assuming that one of the reactant is entirely consumed, determine the moles of the other reactant required for the reaction.

10.0 g NH3×1mol NH317.03g NH3= 0.5872 mol NH3    20

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