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Surface Chemistry

Question

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What is an adsorption isotherm and isobar?

Solution

Answer:

The variation in the amount of gas adsorbed by the adsorbent with pressure at constant temperature can be expressed by means of a curve termed as adsorption isotherm.

A plot of the amount of gas adsorbed x / m against the pressure at constant temperature is called an adsorption isotherm.

A plot of the amount adsorbed x / m versus temperature at constant pressure is called an adsorption isobar.

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