In the given (V-T) diagram, what is the relation between pressure `P_(1) and P_(2)` ?

Options

A. `P_(2)=P_(1)`
B. `P_(2) gt P_(1)`
C. `P_(2) lt P_(1)`
D. cannot say

Answer

C

Explanation

In an isobaric process, P= constant, and
`V prop T or V=((nR)/P)T`
`:. V-T` graph is a straight line with slope `prop 1//P`.
In (figure), `("slope")_(2) gt ("slope")_(1)`
`:. P_(2) lt P_(2)`.