First slide

Introduction-thermodynamics

Question

During the process AB of an ideal gas

Easy

A

Work done on the gas is zero
B

Density of the gas is constant
C

Slope of line AB from the T-axis is inversely proportional to the number of moles the gas
D

Slope of line AB from the T-axis is directly proportional to the number of moles the gas

Solution

$P V = n R T \Rightarrow P = (\frac{n R}{V}) T$
It is constant volume process (isochoric) , so both work done and density will not change and slope is ( $\frac{n R}{V}$ ), so it is proportional to number of moles.

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