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## Homework Statement

An ideal gass is at constant volume risen to a new pressure level of ##P_f##. Find te expression for the total heat brought to the system.

## Homework Equations

3. The Attempt at a Solution [/B]

So ##PV=nRT## and ##E=Q## ##Q=C_v(T_f-T_i)## so i just have to find ##(P_f-P_i)V=nR(Tf-Ti)## with the last term being what i need...?