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Question

Chemistry Question on Surface Chemistry

At the high pressure, Langmuir adsorption isotherm takes the form

A

xm=aP1+bP\frac{x}{m}=\frac{aP}{1+bP}

B

xm=ab\frac{x}{m}=\frac{a}{b}

C

xm=aP\frac{x}{m}=aP

D

xm=ba+1aP\frac{x}{m}=\frac{b}{a}+\frac{1}{aP}

Answer

xm=ab\frac{x}{m}=\frac{a}{b}

Explanation

Solution

Langmuir adsorption isotherm, is xm=aP1+bP\frac{x}{m}=\frac{a P}{1+b P} At high pressure, 1+bP=bP1+b P=b P or xm=aPbP=ab\frac{x}{m}=\frac{a P}{b P}=\frac{a}{b}