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A sample of solid ammonium chloride was placed in an evacuated chamber and then heated, causing it to decompose according to the following reaction: NH 4 Cl ( s ) ⇌ NH 3 ( g ) + HCl ( g ) In a particular experiment, the equilibrium partial pressure of NH 3 ( g ) in the container was 2.9 atm. Calculate the value of K p for the decomposition of NH 4 Cl( s ) at this temperature.

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Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

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Chapter
Section
BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 12, Problem 94CWP
Textbook Problem
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A sample of solid ammonium chloride was placed in an evacuated chamber and then heated, causing it to decompose according to the following reaction:

NH 4 Cl ( s ) NH 3 ( g ) + HCl ( g )

In a particular experiment, the equilibrium partial pressure of NH3(g) in the container was 2.9 atm. Calculate the value of Kp for the decomposition of NH4Cl(s) at this temperature.

Interpretation Introduction

Interpretation: The equilibrium constant in terms of partial pressure for the decomposition of NH4Cl(s) is to be calculated.

Concept introduction: The equilibrium constant Kp describes the ratio of the reactant to the product on the equilibrium conditions in terms of partial pressure.

The equilibrium constant depends upon temperature.

Law of mass action is applicable on the equilibrium reactions.

To determine: The value of the equilibrium constant in terms of partial pressure for the decomposition of NH4Cl(s) .

Explanation of Solution

Explanation

Given

The reaction is given as,

2NH4Cl(s)NH3(g)+HCl(g)

The equilibrium partial pressure of NH3(g) is 2.9atm .

The reactant NH4Cl is present in solid form therefore, the partial pressure of NH4Cl is taken as unity. The change in partial pressure is supposed to be x .

The ICE-table in terms of partial pressure for the decomposition of NH4Cl is given as,

NH4Cl(s)NH3(g)+HCl(g)Initial00Change+

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Chapter 12 Solutions

Chemistry: An Atoms First Approach
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