n the given (V-T) diagram. what is the relation between pressures P1 and P2?

Question

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

(a) P2 < P1

(b) Cannot be predicted

(c) P2 = P1

(d) P2 > P1

Answer 1

Correct option (a) P2< P1

Explanation:

According to ideal gas equation

PV =nRT

or V = nRT/P

For an isobaric process, P = constant and V ∝ T

Therefore, V - T graphs a straight line passing through origin. Slope of this line is inversely proportional to P.

In the given figure

( Slop)2 > ( Slop)1

:. P2 < P1