General Chemistry
General Chemistry
4th Edition
ISBN: 9781891389603
Author: Donald A. McQuarrie, Peter A. Rock, Ethan B. Gallogly
Publisher: University Science Books
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Chapter 23, Problem 23.15P

(a)

Interpretation Introduction

Interpretation:

Value of ΔSrxno has to be determined for the reaction 4 NH3(g) + 7 O2(g)4NO2(g)+ 6 H2O(g).

Concept Introduction:

Entropy(S): it is used to describe the disorder. It is the amount of arrangements possible in a system at a particular state.

Value of ΔSrxno can be calculated by the equation:

  ΔSrxnoS°[products]S°[reactants]

(a)

Expert Solution
Check Mark

Answer to Problem 23.15P

Value of ΔSrxno is 114.4J/Kmol.

Explanation of Solution

The given reaction is shown below,

  4 NH3(g) + 7 O2(g)4NO2(g)+ 6 H2O(g)

Standard entropy of formation values is given below,

  ΔS°[NH3(g)]=192.8J/KmolΔS°[O2(g)]=205.2J/KmolΔS°[NO2(g)]=240.1J/KmolΔS°[H2O(g)]=188.8J/Kmol

Value of ΔSrxno can be calculated by the equation:

  ΔSrxnoS°[products]S°[reactants]

Substitute the values as follows,

  ΔSrxno[(4)(240.1J/Kmol)+(6)(188.8J/Kmol)]  [(4)(192.8J/Kmol)+(7)(205.2J/Kmol)]=114.4J/Kmol

(b)

Interpretation Introduction

Interpretation:

Value of ΔSrxno has to be determined for the reaction CO(g) + 2 H2(g)CH3OH(l).

Concept Introduction:

Refer to (a).

(b)

Expert Solution
Check Mark

Answer to Problem 23.15P

Value of ΔSrxno is 332.3J/Kmol.

Explanation of Solution

The given reaction is shown below,

  CO(g) + 2 H2(g)CH3OH(l)

Standard entropy of formation values is given below,

  ΔS°[CH3OH(l)]=126.8J/KmolΔS°[H2(g)]=130.7J/KmolΔS°[CO(g)]=197.7J/Kmol

Value of ΔSrxno can be calculated by the equation:

  ΔSrxnoS°[products]S°[reactants]

Substitute the values as follows,

  ΔSrxno[(1)(126.8J/Kmol)][(1)(197.7J/Kmol)+(2)(130.7J/Kmol)]=332.3J/Kmol

(c)

Interpretation Introduction

Interpretation:

Value of ΔSrxno has to be determined for the reaction C(s, graphite) + H2O(g)CO(g) + H2(g).

Concept Introduction:

Refer to (a).

(c)

Expert Solution
Check Mark

Answer to Problem 23.15P

Value of ΔSrxno is 133.9J/Kmol.

Explanation of Solution

The given reaction is shown below,

  C(s, graphite) + H2O(g)CO(g) + H2(g)

Standard entropy of formation values is given below,

  ΔS°[C(s, graphite)]=5.7J/KmolΔS°[H2O(g)]=188.8J/KmolΔS°[CO(g)]=197.7J/KmolΔS°[H2(g)]=130.7J/Kmol

Value of ΔSrxno can be calculated by the equation:

  ΔSrxnoS°[products]S°[reactants]

Substitute the values as follows,

  ΔSrxno[(1)(197.7J/Kmol)+(1)(130.7J/Kmol)] [(1)(5.7J/Kmol)+(1)(188.8J/Kmol)]=133.9J/Kmol

(d)

Interpretation Introduction

Interpretation:

Value of ΔSrxno has to be determined for the reaction 2 CO(g) + O2(g)2 CO2(g).

Concept Introduction:

Refer to (a).

(d)

Expert Solution
Check Mark

Answer to Problem 23.15P

Value of ΔSrxno is 173J/Kmol.

Explanation of Solution

The given reaction is shown below,

  2 CO(g) + O2(g)2 CO2(g)

Standard entropy of formation values is given below,

  ΔS°[CO(g)]= 197.7J/KmolΔS°[O2(g)]=205.2J/KmolΔS°[CO2(g)]=213.8J/Kmol

Value of ΔSrxno can be calculated by the equation:

  ΔSrxnoS°[products]S°[reactants]

Substitute the values as follows,

  ΔSrxno[(2)(213.8J/Kmol)][(2)(197.7J/Kmol)+(1)(205.2J/Kmol)]=173J/Kmol

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Chapter 23 Solutions

General Chemistry

Ch. 23 - Prob. 23.11PCh. 23 - Prob. 23.12PCh. 23 - Prob. 23.13PCh. 23 - Prob. 23.14PCh. 23 - Prob. 23.15PCh. 23 - Prob. 23.16PCh. 23 - Prob. 23.17PCh. 23 - Prob. 23.18PCh. 23 - Prob. 23.19PCh. 23 - Prob. 23.20PCh. 23 - Prob. 23.21PCh. 23 - Prob. 23.22PCh. 23 - Prob. 23.23PCh. 23 - Prob. 23.24PCh. 23 - Prob. 23.25PCh. 23 - Prob. 23.26PCh. 23 - Prob. 23.27PCh. 23 - Prob. 23.28PCh. 23 - Prob. 23.29PCh. 23 - Prob. 23.30PCh. 23 - Prob. 23.31PCh. 23 - Prob. 23.32PCh. 23 - Prob. 23.33PCh. 23 - Prob. 23.34PCh. 23 - Prob. 23.35PCh. 23 - Prob. 23.36PCh. 23 - Prob. 23.37PCh. 23 - Prob. 23.38PCh. 23 - Prob. 23.39PCh. 23 - Prob. 23.40PCh. 23 - Prob. 23.41PCh. 23 - Prob. 23.42PCh. 23 - Prob. 23.43PCh. 23 - Prob. 23.44PCh. 23 - Prob. 23.45PCh. 23 - Prob. 23.46PCh. 23 - Prob. 23.47PCh. 23 - Prob. 23.48PCh. 23 - Prob. 23.49PCh. 23 - Prob. 23.50PCh. 23 - Prob. 23.51PCh. 23 - Prob. 23.52PCh. 23 - Prob. 23.53PCh. 23 - Prob. 23.54PCh. 23 - Prob. 23.55PCh. 23 - Prob. 23.56PCh. 23 - Prob. 23.57PCh. 23 - Prob. 23.58PCh. 23 - Prob. 23.59PCh. 23 - Prob. 23.60PCh. 23 - Prob. 23.61PCh. 23 - Prob. 23.62PCh. 23 - Prob. 23.63PCh. 23 - Prob. 23.64PCh. 23 - Prob. 23.65PCh. 23 - Prob. 23.66PCh. 23 - Prob. 23.67PCh. 23 - Prob. 23.68PCh. 23 - Prob. 23.69PCh. 23 - Prob. 23.70PCh. 23 - Prob. 23.71PCh. 23 - Prob. 23.72PCh. 23 - Prob. 23.73PCh. 23 - Prob. 23.74PCh. 23 - Prob. 23.75PCh. 23 - Prob. 23.76PCh. 23 - Prob. 23.77PCh. 23 - Prob. 23.78PCh. 23 - Prob. 23.79PCh. 23 - Prob. 23.80PCh. 23 - Prob. 23.81PCh. 23 - Prob. 23.82PCh. 23 - Prob. 23.83PCh. 23 - Prob. 23.84PCh. 23 - Prob. 23.85PCh. 23 - Prob. 23.86PCh. 23 - Prob. 23.87PCh. 23 - Prob. 23.88P
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