Chemistry
Chemistry
4th Edition
ISBN: 9780393919370
Author: Thomas R. Gilbert
Publisher: NORTON
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Chapter 13, Problem 13.88QP
Interpretation Introduction

Interpretation: The fuel values of liquid propanol and isopropanol are to be calculated. The comparison of their fuel values is to be done.

Concept introduction: Fuel value is defined as the amount of energy which is generated by the complete combustion of a particular mass of the fuel. The fuel value of alcohols increases with increase in number of carbon atoms in the alcohol.

To determine: The fuel value of propanol and isopropanol and the comparison of their fuel values.

Expert Solution & Answer
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Answer to Problem 13.88QP

The fuel value of diethyl ether is 36.77kJ/g_. The fuel value of butanol is 36.02kJ/g_. The fuel value of diethyl ether is greater than butanol.

Explanation of Solution

The structure of propanol is,

Chemistry, Chapter 13, Problem 13.88QP , additional homework tip  1

Figure 1

The structure of isopropanol is,

Chemistry, Chapter 13, Problem 13.88QP , additional homework tip  2

Figure 2

The fuel value is calculated by the formula,

Fuelvalue=HeatofcombustionMassofsubstance (1)

Propanol ( C3H8O) burns according to the thermochemical equation:

2C3H8O(l)+9O2(g)6CO2(g)+8H2O(l)

According to the above reaction, 2 moles of propanol are consumed in the process of combustion.

Molar mass of propanol is 60.09g/mol.

Since, mass of 1 mol of C3H8O(l) is 60.09g.

Therefore, mass of 2 moles of C3H8O(l) is 2×60.09g=120.18g.

The heat of combustion of propanol is 2021kJ/mol.

Substitute the value of heat of combustion of propanol and its mass in equation (1).

Fuelvalue=2021kJ/mol120.18g/mol=16.81kJ/g

Isopropanol ( C3H8O) burns according to the thermochemical equation:

2C3H8O(l)+9O2(g)6CO2(g)+8H2O(l)

According to the above reaction, 2 moles of isopropanol are consumed in the process of combustion.

Molar mass of isopropanol is 60.01g/mol.

Since, mass of 1 mol of C3H8O(l) is 60.01g/mol.

Therefore, mass of 2 moles of C3H8O(l) is 2×60.01g=120.02g.

The heat of combustion of isopropanol is 2005kJ/mol.

Substitute the value of heat of combustion of isopropanol and its mass in equation (1).

Fuelvalue=2005kJ/mol120.02g/mol=16.70kJ/g

The fuel value of diethyl ether is 36.77kJ/g_. The fuel value of butanol is 36.02kJ/g_. The fuel value of diethyl ether is greater than butanol.

Conclusion

The fuel value of diethyl ether is 36.77kJ/g_. The fuel value of butanol is 36.02kJ/g_. The fuel value of diethyl ether is greater than butanol.

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Chapter 13 Solutions

Chemistry

Ch. 13.7 - Prob. 11PECh. 13.8 - Prob. 12PECh. 13.8 - Prob. 13PECh. 13 - Prob. 13.1VPCh. 13 - Prob. 13.2VPCh. 13 - Prob. 13.3VPCh. 13 - Prob. 13.4VPCh. 13 - Prob. 13.5VPCh. 13 - Prob. 13.6VPCh. 13 - Prob. 13.7VPCh. 13 - Prob. 13.8VPCh. 13 - Prob. 13.9VPCh. 13 - Prob. 13.10VPCh. 13 - Prob. 13.11VPCh. 13 - Prob. 13.12VPCh. 13 - Prob. 13.13VPCh. 13 - Prob. 13.14VPCh. 13 - Prob. 13.15VPCh. 13 - Prob. 13.16VPCh. 13 - Prob. 13.17QPCh. 13 - Prob. 13.18QPCh. 13 - Prob. 13.19QPCh. 13 - Prob. 13.20QPCh. 13 - Prob. 13.21QPCh. 13 - Prob. 13.22QPCh. 13 - Prob. 13.23QPCh. 13 - Prob. 13.24QPCh. 13 - Prob. 13.25QPCh. 13 - Prob. 13.26QPCh. 13 - Prob. 13.27QPCh. 13 - Prob. 13.28QPCh. 13 - Prob. 13.29QPCh. 13 - Prob. 13.30QPCh. 13 - Prob. 13.31QPCh. 13 - Prob. 13.32QPCh. 13 - Prob. 13.33QPCh. 13 - Prob. 13.34QPCh. 13 - Prob. 13.35QPCh. 13 - Prob. 13.36QPCh. 13 - Prob. 13.37QPCh. 13 - Prob. 13.38QPCh. 13 - Prob. 13.39QPCh. 13 - Prob. 13.40QPCh. 13 - Prob. 13.41QPCh. 13 - Prob. 13.42QPCh. 13 - Prob. 13.43QPCh. 13 - Prob. 13.44QPCh. 13 - Prob. 13.45QPCh. 13 - Prob. 13.46QPCh. 13 - Prob. 13.47QPCh. 13 - Prob. 13.48QPCh. 13 - Prob. 13.49QPCh. 13 - Prob. 13.50QPCh. 13 - Prob. 13.51QPCh. 13 - Prob. 13.52QPCh. 13 - Prob. 13.53QPCh. 13 - Prob. 13.54QPCh. 13 - Prob. 13.55QPCh. 13 - Prob. 13.56QPCh. 13 - Prob. 13.57QPCh. 13 - Prob. 13.58QPCh. 13 - Prob. 13.59QPCh. 13 - Prob. 13.60QPCh. 13 - Prob. 13.61QPCh. 13 - Prob. 13.62QPCh. 13 - Prob. 13.63QPCh. 13 - Prob. 13.64QPCh. 13 - Prob. 13.65QPCh. 13 - Prob. 13.66QPCh. 13 - Prob. 13.67QPCh. 13 - Prob. 13.68QPCh. 13 - Prob. 13.69QPCh. 13 - Prob. 13.70QPCh. 13 - Prob. 13.71QPCh. 13 - Prob. 13.72QPCh. 13 - Prob. 13.73QPCh. 13 - Prob. 13.74QPCh. 13 - Prob. 13.75QPCh. 13 - Prob. 13.76QPCh. 13 - Prob. 13.77QPCh. 13 - Prob. 13.78QPCh. 13 - Prob. 13.79QPCh. 13 - Prob. 13.80QPCh. 13 - Prob. 13.81QPCh. 13 - Prob. 13.82QPCh. 13 - Prob. 13.83QPCh. 13 - Prob. 13.84QPCh. 13 - Prob. 13.85QPCh. 13 - Prob. 13.86QPCh. 13 - Prob. 13.87QPCh. 13 - Prob. 13.88QPCh. 13 - Prob. 13.89QPCh. 13 - Prob. 13.90QPCh. 13 - Prob. 13.91QPCh. 13 - Prob. 13.92QPCh. 13 - Prob. 13.93QPCh. 13 - Prob. 13.94QPCh. 13 - Prob. 13.95QPCh. 13 - Prob. 13.96QPCh. 13 - Prob. 13.97QPCh. 13 - Prob. 13.98QPCh. 13 - Prob. 13.99QPCh. 13 - Prob. 13.100QPCh. 13 - Prob. 13.101QPCh. 13 - Prob. 13.102QPCh. 13 - Prob. 13.103QPCh. 13 - Prob. 13.104QPCh. 13 - Prob. 13.105QPCh. 13 - Prob. 13.106QPCh. 13 - Prob. 13.107QPCh. 13 - Prob. 13.108QPCh. 13 - Prob. 13.109QPCh. 13 - Prob. 13.110QPCh. 13 - Prob. 13.111QPCh. 13 - Prob. 13.112QPCh. 13 - Prob. 13.113QPCh. 13 - Prob. 13.114QPCh. 13 - Prob. 13.115QPCh. 13 - Prob. 13.116QPCh. 13 - Prob. 13.117QPCh. 13 - Prob. 13.118QPCh. 13 - Prob. 13.119QPCh. 13 - Prob. 13.120QPCh. 13 - Prob. 13.121QPCh. 13 - Prob. 13.122QPCh. 13 - Prob. 13.123QPCh. 13 - Prob. 13.124QPCh. 13 - Prob. 13.125QPCh. 13 - Prob. 13.126QPCh. 13 - Prob. 13.127QPCh. 13 - Prob. 13.128QPCh. 13 - Prob. 13.129QPCh. 13 - Prob. 13.130QPCh. 13 - Prob. 13.131QPCh. 13 - Prob. 13.132QPCh. 13 - Prob. 13.133QPCh. 13 - Prob. 13.134QPCh. 13 - Prob. 13.135APCh. 13 - Prob. 13.136APCh. 13 - Prob. 13.137APCh. 13 - Prob. 13.138APCh. 13 - Prob. 13.139APCh. 13 - Prob. 13.140APCh. 13 - Prob. 13.141APCh. 13 - Prob. 13.142APCh. 13 - Prob. 13.143APCh. 13 - Prob. 13.144APCh. 13 - Prob. 13.145APCh. 13 - Prob. 13.146APCh. 13 - Prob. 13.147APCh. 13 - Prob. 13.148APCh. 13 - Prob. 13.149APCh. 13 - Prob. 13.150APCh. 13 - Prob. 13.151AP
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