(a)
Interpretation:
Energy possessed by a mole of photon should be calculated and expressed with the units of kilojoules and kilocalories.
Concept introduction:
A photon can be introduced as a piece of energy which has no mass. The relationship between the energy of a photon and its wavelength can be expressed with the following Planck-Einstein equation represented as follows:
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Answer to Problem 23P
Explanation of Solution
A photon can be introduced as a piece of energy which has no mass. The speed of a photon is equal to the speed of the light. The relationship between the energy of a photon and its wavelength can be expressed with the Planck-Einstein equation represented as follows:
Here,
Since, the frequency of the photon is not given, the equation of
Using
Substituting
=
Since,
Energy of a photon in kilojoules,
Since,
Number of photons in a mole = Avogadro number of photons
Therefore, energy of mole of photon in kiloJoules,
Energy of a photon in kilojoules
Energy of a photon in kilocalories,
Number of photons in a mole = Avogadro number of photons
Therefore, Energy of moles of photon in kilocalories,
Einstein is also a unit of energy.
Einstein
Thus, energy of mole of photon in kilo Joules =
Energy of moles of photon in kilocalories =
(b)
Interpretation:
The maximum increase in the redox potential induced by 1000 nm photon needs to be determined.
Concept introduction:
One electron volt is the energy need to move an electron between one-volt potential difference.
One electron volt
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Answer to Problem 23P
Explanation of Solution
The maximum increase in a redox potential can be calculated as follows:
Putting the values,
(c)
Interpretation:
Number of photons need to overcome the Gibbs free energy should be calculated.
Concept introduction:
In a simple definition, Gibbs free energy of a reaction is the energy associated with that particular
Phosphorylation is the conversion of ATP from ADP.
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Answer to Problem 23P
Explanation of Solution
Phosphorylation is the conversion of ATP from ADP.
ATP- Adenosine triphosphate
ADP-Adenosine diphosphate
Therefore,
Energy needed for the phosphorylation reaction = Energy needed to convert a mole of ADP to ATP =
Number of ADP in one mole of ADP =
Energy needed to convert one ADP to ATP,
=
Maximum energy that one
Minimum number of
Putting the values,
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Chapter 19 Solutions
BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
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