In the given (V-T) diagram, what is the relation between pressure P1 and P2?

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In the given (V-T) diagram, what is the relation between pressure P1 and P2?

Option A Cannot be predicted
Option B P2 =P1
Option C P2 > P1
Option D P2 < P1

Solution:

The correct option is Option D

According to the ideal gas equation,

PV =nRT

or we can write: V = nRT/P

We know that for an isobaric process, P = constant and V ∝ T Therefore, V-T graph is a straight line passing through the origin and the slope of this line is inversely proportional to P.

In the given figure, we can see that

(Slop)2 > (Slop)1

Therefore, P2 < P1

i

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