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