How does the enthalpy of photosynthesis compare to the enthalpy of cellular respiration?

A. Respiration releases twice as much energy from glucose as photosynthesis takes to form glucose.
B. Photosynthesis has a much higher enthalpy than cellular respiration.
C. Respiration stores three times as much energy as photosynthesis.
D. Respiration has an equal enthalpy to cellular respiration

Question

17-08-2022
Chemistry

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How does the enthalpy of photosynthesis compare to the enthalpy of cellular respiration?

A. Respiration releases twice as much energy from glucose as photosynthesis takes to form glucose.
B. Photosynthesis has a much higher enthalpy than cellular respiration.
C. Respiration stores three times as much energy as photosynthesis.
D. Respiration has an equal enthalpy to cellular respiration

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aliasger2709 aliasger2709 · Answer 1 · 2022-08-19T12:16:06+02:00

Enthalpy is given by the sum of the internal energy and the product of the pressure and volume. Both photosynthesis and cellular respiration have equal enthalpy. Thus, option D is correct.

What are cellular respiration and photosynthesis?

Cellular respiration and photosynthesis are the processes that occur in the cell to utilize and produce energy. Photosynthetic and cellular respiration reaction is given as,

6 CO₂ + H₂O ⇒ C₆H₁₂O₆ + 6O₂

C₆H₁₂O₆ + 6O₂ ⇒ 6 CO₂ + H₂O

From both, it can be seen that the products of the photosynthetic reaction act as the reactant of the other reaction. The enthalpy will be the same as the same molecules are used in both reactions.

Therefore, in option D. the photosynthetic and cellular respiration has the same enthalpy.

Learn more about photosynthesis and cellular respiration here:

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