Multiple Choice
Which of the following comparisons or contrasts between endergonic and exergonic reactions is false?
8. Thermochemistry
Endothermic & Exothermic Reactions
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Which of the following reactions is an endergonic reaction?
A
Respiration
B
Photosynthesis
C
Rusting of iron
D
Combustion of glucose
Verified step by step guidance1
Understand the concept of endergonic reactions: Endergonic reactions are chemical reactions that require an input of energy to proceed. They are characterized by a positive change in Gibbs free energy (ΔG > 0).
Identify the nature of each reaction: Analyze each given reaction to determine whether it absorbs or releases energy.
Photosynthesis: This process involves the conversion of carbon dioxide and water into glucose and oxygen using sunlight energy. It is an endergonic reaction because it requires energy input from sunlight.
Respiration: This is the process of breaking down glucose into carbon dioxide and water, releasing energy. It is an exergonic reaction (ΔG < 0).
Rusting of iron and combustion of glucose: Both are exergonic reactions as they release energy. Rusting involves the oxidation of iron, and combustion involves the oxidation of glucose, both releasing energy.
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