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Chapter 19: Q11P (page 662)

Estimate the change in free energy whenundergoes photooxidation.

Short Answer

Expert verified

The change in free energy when P960 undergoes photo-oxidation is 140kJ/mol.

Step by step solution

01

Photooxidation

The rate of photosynthesis can occasionally be inhibited by strong light intensities because they oxidize the chlorophyll and this process is referred to as photo-oxidation.

02

Step 2: The change in free energy

From the figure of photosynthetic electron-transport system of purple bacteria, the change in redox potential is 螖蔚o'=-1.5V.

In this case, n of electrons is 1.

The change in free energy is calculated using the following equation:

螖骋o'=-苍贵螖蔚o'螖骋o'=(-1)脳96螖骋o\cent=(-1)脳(96,485C/mol)脳(-1.5V)=140000J/mol=140kJ/mol

Hence, the change in free energy is 140kJ/mol.

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Most popular questions from this chapter

The 鈥渞ed tide鈥� is a massive proliferation of certain algal species that causes seawater to become visibly red. Describe the spectral characteristics of the dominant photosynthetic pigments in the algae.

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The net equation for oxidative phosphorylation can be written as

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Write an analogous equation for the light reactions of photosynthesis.

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