# Thermodynamics Question - Should be pretty easy

## Homework Statement

I'm trying to understand this concept of pressures and volumes changing and how it effects the temperature. Is my understanding correct so far?

If pressure is changing but volume is constant is

Final Temperature = Initial Temperature + (something) ?

If this is right so far, I'm stuck on coming up with the "something" value. If it is wrong, how can I determine this?

Thank you

## Homework Equations

PV = NKT
(U2 - U1) = (1/2) * NKfT

## Answers and Replies

rude man
Homework Helper
Gold Member
Shoot this over to the Introductory Physics forum.

Andrew Mason
Science Advisor
Homework Helper

## Homework Statement

I'm trying to understand this concept of pressures and volumes changing and how it effects the temperature. Is my understanding correct so far?

If pressure is changing but volume is constant is

Final Temperature = Initial Temperature + (something) ?

If PV=nRT and V is constant then:

P/T = constant

So:

Pf/Tf = Pi/Ti

or:

Tf/Ti = Pf/Pi

AM