Living by Chemistry
Living by Chemistry
2nd Edition
ISBN: 9781464142314
Author: Angelica M. Stacy
Publisher: W. H. Freeman
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Chapter U5.104, Problem 6E
Solution

(a)

Interpretation: The total energy required to break the bonds in the reactant molecules needs to be calculated.

Concept Introduction : The total bond energy can be defined as the summation of individual bond energies of the bonds in the molecule.

The total energy required to break the bonds in the reactant molecules is 1358 kJ.

The bond energy of Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  1is 432 kJ/mol, Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  2is 142 kJ/mol

In the reaction,

  2H2+O22H2O

The total bond energy can be calculated as the sum of bond energies of Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  3and Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  4bonds.

Total energy (E)= 2 Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  5bond) + Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  6bond)

  E=432+494=1358kJ

(b)

Interpretation: The total energy released by the formation of bonds in the product molecule needs to be calculated.

Concept Introduction : The total bond energy can be defined as the summation of individual bond energies of the bonds in the molecule.

The total energy released by the formation of bonds in the product molecule is 1836 kJ.

In the reaction,

  2H2+O22H2O

The total bond energy of the product molecule can be calculated as the bond energy of Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  7molecule.

The bond energy of Living by Chemistry, Chapter U5.104, Problem 6E , additional homework tip  8is 459 kJ/mol.

So,

  Totalenergy(E)=4(H-Obondenergy)=459=1836kJ

(c)

Interpretation: The reaction is endothermic or exothermic needs to be determined using the value of (a) and (b).

Concept Introduction : The total bond energy can be defined as the summation of individual bond energies of the bonds in the molecule.

If the energy value is positive, then the reaction is an endothermic reaction and if the energy value is negative, the reaction is an exothermic reaction.

The reaction,

  2H2+O22H2O is an endothermic reaction.

From (a) and (b), we can determine that the reaction is endothermic or exothermic by calculating the heat of the reaction.

So,

  Heatofthereaction=(1358+1836)kJ=478kJ

Therefore, the reaction is an endothermic reaction.

The reaction is an endothermic reaction because, the heat of reaction is 478kJ which is a positive value.

Chapter U5 Solutions

Living by Chemistry

Ch. U5.95 - Prob. 3ECh. U5.95 - Prob. 4ECh. U5.95 - Prob. 5ECh. U5.96 - Prob. 1TAICh. U5.96 - Prob. 1ECh. U5.96 - Prob. 2ECh. U5.96 - Prob. 3ECh. U5.96 - Prob. 4ECh. U5.96 - Prob. 5ECh. U5.96 - Prob. 6ECh. U5.96 - Prob. 7ECh. U5.96 - Prob. 8ECh. U5.96 - Prob. 9ECh. U5.96 - Prob. 10ECh. U5.96 - Prob. 11ECh. U5.97 - Prob. 1TAICh. U5.97 - Prob. 1ECh. U5.97 - Prob. 2ECh. U5.97 - Prob. 3ECh. U5.97 - Prob. 4ECh. U5.97 - Prob. 5ECh. U5.97 - Prob. 6ECh. U5.97 - Prob. 7ECh. U5.98 - Prob. 1TAICh. U5.98 - Prob. 1ECh. U5.98 - Prob. 2ECh. U5.98 - Prob. 3ECh. U5.98 - Prob. 4ECh. U5.98 - Prob. 5ECh. U5.98 - Prob. 6ECh. U5.98 - Prob. 7ECh. U5.98 - Prob. 8ECh. U5.98 - Prob. 9ECh. U5.98 - Prob. 10ECh. U5.99 - Prob. 1TAICh. U5.99 - Prob. 1ECh. U5.99 - Prob. 2ECh. U5.99 - Prob. 3ECh. U5.99 - Prob. 4ECh. U5.99 - Prob. 5ECh. U5.99 - Prob. 6ECh. U5.99 - Prob. 7ECh. U5.99 - Prob. 8ECh. U5.99 - Prob. 9ECh. U5.100 - Prob. 1TAICh. U5.100 - Prob. 1ECh. U5.100 - Prob. 2ECh. U5.100 - Prob. 3ECh. U5.100 - Prob. 4ECh. U5.100 - Prob. 5ECh. U5.101 - Prob. 1TAICh. U5.101 - Prob. 1ECh. U5.101 - Prob. 2ECh. U5.101 - Prob. 3ECh. U5.101 - Prob. 4ECh. U5.101 - Prob. 6ECh. U5.102 - Prob. 1TAICh. U5.102 - Prob. 1ECh. U5.102 - Prob. 2ECh. U5.102 - Prob. 3ECh. U5.102 - Prob. 4ECh. U5.102 - Prob. 5ECh. U5.102 - Prob. 6ECh. U5.102 - Prob. 8ECh. U5.103 - Prob. 1TAICh. U5.103 - Prob. 1ECh. U5.103 - Prob. 2ECh. U5.103 - Prob. 3ECh. U5.103 - Prob. 4ECh. U5.103 - Prob. 5ECh. U5.103 - Prob. 6ECh. U5.104 - Prob. 1TAICh. U5.104 - Prob. 1ECh. U5.104 - Prob. 2ECh. U5.104 - Prob. 3ECh. U5.104 - Prob. 4ECh. U5.104 - Prob. 5ECh. U5.104 - Prob. 6ECh. U5.104 - Prob. 7ECh. U5.104 - Prob. 8ECh. U5.104 - Prob. 9ECh. U5.105 - Prob. 1TAICh. U5.105 - Prob. 1ECh. U5.105 - Prob. 2ECh. U5.105 - Prob. 3ECh. U5.105 - Prob. 4ECh. U5.105 - Prob. 5ECh. U5.106 - Prob. 1TAICh. U5.106 - Prob. 1ECh. U5.106 - Prob. 2ECh. U5.106 - Prob. 3ECh. U5.106 - Prob. 4ECh. U5.106 - Prob. 5ECh. U5.106 - Prob. 6ECh. U5.106 - Prob. 7ECh. U5.106 - Prob. 8ECh. U5.106 - Prob. 9ECh. U5.106 - Prob. 11ECh. U5.107 - Prob. 1TAICh. U5.107 - Prob. 1ECh. U5.107 - Prob. 2ECh. U5.107 - Prob. 3ECh. U5.107 - Prob. 4ECh. U5.108 - Prob. 1TAICh. U5.108 - Prob. 1ECh. U5.108 - Prob. 2ECh. U5.108 - Prob. 3ECh. U5.108 - Prob. 4ECh. U5.108 - Prob. 5ECh. U5.109 - Prob. 1TAICh. U5.109 - Prob. 1ECh. U5.109 - Prob. 2ECh. U5.109 - Prob. 3ECh. U5.109 - Prob. 4ECh. U5.109 - Prob. 5ECh. U5.109 - Prob. 6ECh. U5.109 - Prob. 7ECh. U5.109 - Prob. 8ECh. U5.110 - Prob. 1TAICh. U5.110 - Prob. 1ECh. U5.110 - Prob. 2ECh. U5.110 - Prob. 3ECh. U5.110 - Prob. 4ECh. U5.110 - Prob. 5ECh. U5.110 - Prob. 6ECh. U5.110 - Prob. 7ECh. U5.111 - Prob. 1TAICh. U5.111 - Prob. 1ECh. U5.111 - Prob. 2ECh. U5.111 - Prob. 3ECh. U5.111 - Prob. 4ECh. U5.111 - Prob. 5ECh. U5.111 - Prob. 6ECh. U5.111 - Prob. 7ECh. U5.111 - Prob. 8ECh. U5.111 - Prob. 9ECh. U5.112 - Prob. 1TAICh. U5.112 - Prob. 1ECh. U5.112 - Prob. 2ECh. U5.112 - Prob. 3ECh. U5.112 - Prob. 4ECh. U5.112 - Prob. 5ECh. U5.112 - Prob. 6ECh. U5.112 - Prob. 7ECh. U5.113 - Prob. 1TAICh. U5.113 - Prob. 1ECh. U5.113 - Prob. 2ECh. U5.113 - Prob. 3ECh. U5.113 - Prob. 4ECh. U5.113 - Prob. 5ECh. U5.113 - Prob. 6ECh. U5.113 - Prob. 7ECh. U5.113 - Prob. 8ECh. U5.114 - Prob. 1TAICh. U5.114 - Prob. 1ECh. U5.114 - Prob. 2ECh. U5.114 - Prob. 3ECh. U5.114 - Prob. 4ECh. U5.114 - Prob. 5ECh. U5.114 - Prob. 6ECh. U5.115 - Prob. 1TAICh. U5.115 - Prob. 1ECh. U5.115 - Prob. 2ECh. U5.115 - Prob. 3ECh. U5.115 - Prob. 4ECh. U5.115 - Prob. 5ECh. U5.115 - Prob. 6ECh. U5.115 - Prob. 7ECh. U5.116 - Prob. 1TAICh. U5.116 - Prob. 1ECh. U5.116 - Prob. 2ECh. U5.116 - Prob. 3ECh. U5.116 - Prob. 4ECh. U5.116 - Prob. 5ECh. U5.116 - Prob. 6ECh. U5.116 - Prob. 7ECh. U5.116 - Prob. 8ECh. U5 - Prob. C18.1RECh. U5 - Prob. C18.2RECh. U5 - Prob. C18.3RECh. U5 - Prob. C18.4RECh. U5 - Prob. C18.5RECh. U5 - Prob. C18.6RECh. U5 - Prob. C18.7RECh. U5 - Prob. C18.8RECh. U5 - Prob. C19.1RECh. U5 - Prob. C19.2RECh. U5 - Prob. C19.3RECh. U5 - Prob. C19.4RECh. U5 - Prob. C20.1RECh. U5 - Prob. C20.2RECh. U5 - Prob. C20.3RECh. U5 - Prob. C20.4RECh. U5 - Prob. C20.6RECh. U5 - Prob. C21.1RECh. U5 - Prob. C21.2RECh. U5 - Prob. C21.3RECh. U5 - Prob. C21.4RECh. U5 - Prob. C21.5RECh. U5 - Prob. 1RECh. U5 - Prob. 2RECh. U5 - Prob. 3RECh. U5 - Prob. 4RECh. U5 - Prob. 5RECh. U5 - Prob. 6RECh. U5 - Prob. 7RECh. U5 - Prob. 8RECh. U5 - Prob. 9RECh. U5 - Prob. 10RECh. U5 - Prob. 11RECh. U5 - Prob. 12RECh. U5 - Prob. 13RECh. U5 - Prob. 14RECh. U5 - Prob. 15RECh. U5 - Prob. 16RECh. U5 - Prob. 17RECh. U5 - Prob. 1STPCh. U5 - Prob. 2STPCh. U5 - Prob. 3STPCh. U5 - Prob. 4STPCh. U5 - Prob. 5STPCh. U5 - Prob. 6STPCh. U5 - Prob. 7STPCh. U5 - Prob. 8STPCh. U5 - Prob. 9STPCh. U5 - Prob. 10STPCh. U5 - Prob. 11STPCh. U5 - Prob. 12STPCh. U5 - Prob. 13STPCh. U5 - Prob. 14STPCh. U5 - Prob. 15STPCh. U5 - Prob. 16STPCh. U5 - Prob. 17STPCh. U5 - Prob. 18STPCh. U5 - Prob. 19STPCh. U5 - Prob. 20STPCh. U5 - Prob. 21STPCh. U5 - Prob. 22STP
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