reversible expansion

[nancy awwad]

One mole of an ideal gas having CV = 25.0 J.K−1 is in a volume V1 = 28.0 L at P1 =
1.00 bar. It is expanded reversibly along a path given by P = P1 − 0.005000(V − V1) to
a final volume V2 = 100.0 L. Calculate the final temperature T2 and the values of q,
w, ΔE, ΔH for this change in state.

[I like Serena]

Welcome to PF, nancy_awwad! :smile:

It would help if you would show some of what you tried.
Then we could better point you in the right way.

Let's start with P2.
Can you calculate it from the formula you already have?

[nancy awwad]

we already know that PV=nRT then i ve calculated T1

[I like Serena]

we already know that PV=nRT then i ve calculated T1

Good!
So what is T1?

To find T2 you first need to find P2.

Can you calculate P2 using P = P1 − 0.005000(V − V1)?