2. Calculate the energy released by the burning, or oxidation, of 1 g of glucose, C6H12O6 (Figure 11). T/ [ans: 15 kJ/g]
2. Calculate the energy released by the burning, or oxidation, of 1 g of glucose, C6H12O6 (Figure 11). T/ [ans: 15 kJ/g]
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter2: Molecules Of Life
Section: Chapter Questions
Problem 2FIO: B. A chlorine atom (Cl) becomes a negatively charged chloride ion (Cl) when it gains an electron and...
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Question
I need help with number 2
![Clant bonds
The bonds that are fo
In the products are eight C=0 bonds and eight 0-H
bonds. When these bonds are formed, energy is released. The amount of energy
released is calculated as follows:
8(799 kJ/mol) + 8(459 kJ/mol)
= 10 064 kJ released during the formation of
product bonds
Therefore, the energy released by the formation of bonds in the products is
greater than the energy added by breaking the bonds in the reactants. The
energy released is
10 064 kJ-8002 kJ = 2062 kJ
One mole of butanoic acid has a mass of 88 g/mol, so the energy content per gram is
2062 kJ/mol
= 23 kJ/g of butanoic acid
88 g/mol
The overall oxidation reaction releases energy; therefore, the oxidation of
butanoic acid is an exothermic reaction.
Practice
1. Calculate the energy released per gram of propane when it is burned in a combustion
reaction. The chemical formula for propane is C₂H₂
H
HC04
0 H
H
C
KEL
о нн
HEO
0 H
(Figure 10). [ans: 46 kJ/g]
2. Calculate the energy released by the burning, or
oxidation, of 1 g of glucose, C6H12O6 (Figure 11).
T/ [ans: 15 kJ/g]
H
H
H
H-C-C-C-H
1
H H H
4.V
H
Figure 10 Chemical structure of propane
Figure 11 Chemical structure of glucose
3. Compare the energy released, per gram, during the complete combustion of butanoic
acid (Sample Problem 2) with the energy released during the complete combustion of
methane (Sample Problem 1). Which substance has more potential energy? Explain to a
classmate how you came to your conclusion. C](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F94b31f09-c153-4415-af45-1072c0d8396d%2Fb5c892cc-1204-4354-95e6-e578096c046b%2F962e4w_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Clant bonds
The bonds that are fo
In the products are eight C=0 bonds and eight 0-H
bonds. When these bonds are formed, energy is released. The amount of energy
released is calculated as follows:
8(799 kJ/mol) + 8(459 kJ/mol)
= 10 064 kJ released during the formation of
product bonds
Therefore, the energy released by the formation of bonds in the products is
greater than the energy added by breaking the bonds in the reactants. The
energy released is
10 064 kJ-8002 kJ = 2062 kJ
One mole of butanoic acid has a mass of 88 g/mol, so the energy content per gram is
2062 kJ/mol
= 23 kJ/g of butanoic acid
88 g/mol
The overall oxidation reaction releases energy; therefore, the oxidation of
butanoic acid is an exothermic reaction.
Practice
1. Calculate the energy released per gram of propane when it is burned in a combustion
reaction. The chemical formula for propane is C₂H₂
H
HC04
0 H
H
C
KEL
о нн
HEO
0 H
(Figure 10). [ans: 46 kJ/g]
2. Calculate the energy released by the burning, or
oxidation, of 1 g of glucose, C6H12O6 (Figure 11).
T/ [ans: 15 kJ/g]
H
H
H
H-C-C-C-H
1
H H H
4.V
H
Figure 10 Chemical structure of propane
Figure 11 Chemical structure of glucose
3. Compare the energy released, per gram, during the complete combustion of butanoic
acid (Sample Problem 2) with the energy released during the complete combustion of
methane (Sample Problem 1). Which substance has more potential energy? Explain to a
classmate how you came to your conclusion. C
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