How do transmittance, absorbance, and molar absorptivity differ? Which one is proportional to concentration?

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Nicole Bender

Chemistry

Today, 11:24

How do transmittance, absorbance, and molar absorptivity differ? Which one is proportional to concentration?

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Maximus Martinez · Answer 1

The transmittance is the amount of energy that a body goes through in a certain amount of time without being absorbed and the absorbance is the amount of light that is absorbed by a solution.

There is no difference between absorptivity and molar absorptivity because the two terms express the same idea, because molar absorptivity is the absorbance of a solution per unit path length and concentration, so that the absorbance is proportional to concentration.