Concept explainers
A.
To calculate: The energy of a mole of photon at 400nm (violet light), 680 (red light) nm and 800 (near-infrared light) nm.
A.
Explanation of Solution
Calculation:
Mole of photons, N = 6×1023 photons/mole
Here the energy of photon at any given wavelength is equal to product of one photon and
Planck’s constant, h
Velocity of light, c = 3×1017 nm/sec
Energy of mole of photon at 400nm λ, E=
Energy of mole of photon at 680nm λ, E=
Energy of mole of photon at 800nm λ, E=
B.
To calculate: The number of seconds it would take for a mole of photons to strike a square meter of leaf.
B.
Explanation of Solution
Calculation:
One square meter of leaf receives = 0.3 kcal/sec of 680 nm light
Energy of a mole of photon at 680 nm of light = 42 kcal/mole
Time taken by a square meter of leaf to receive one mole of photon,
C.
To calculate: The time it would take a tomato plant with a leaf area of 1 square meter to make a mole of glucose from CO2
C.
Explanation of Solution
Calculation:
Time taken for mole of photons to strike a square meter of leaf = 140 seconds.
No. of photons required to fix a molecule of CO2= 8
Time taken to synthesize a mole of glucose is given as t
D.
To calculate: The efficiency of conversion of light energy into chemical energy after photon capture.
D.
Explanation of Solution
Calculation:
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Chapter 14 Solutions
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