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Introduction

For the isoth...

Question

For the isothermal expansion of an ideal gas?

A

U

and

H

increases

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B

U

increases but

H

decreases

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C

H

increases but

U

decreases

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D

U

and

H

are unaltered

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Solution

The correct option is A $U$ and $H$ increases
For isothermal expansion of ideal gas,
$△ H = n C_{p} △ T$ [ $T =$ constant] $△ T = 0$
$△ U = n C_{p} △ T$ $△ H = 0; △ U = 0$

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