# PV work done question

1. Aug 27, 2011

### quietrain

1. The problem statement, all variables and given/known data

calculate work done to compress 1mole of ideal gas from 1atm to 0.5atm at 298K
where it is subjected to constant external pressure of 1atm

2. Relevant equations
Won = -Integral pdV = -(1atm)(Vf-Vi) = -p(RT/pf - RT/pi) = 2270J

where i have assumed T does not change, is it correct to assume so?

because i read that T changes proportionally with V, if so, how do i find what is my (Vf-Vi)

thanks!

2. Aug 27, 2011

### Hootenanny

Staff Emeritus
Are you sure that you have the question copied correctly. In particular, could you check that the two highlighted quantities should not be volumes?

3. Aug 29, 2011

### quietrain

yes thats what the question wrote

thats why i found it strange.

shouldn't it be vol, so that its just P(vf-vi)?

4. Aug 29, 2011

### Hootenanny

Staff Emeritus
That would be my guess. There are two conflicting statements. The first specifies a change in pressure, whilst the second asserts a constant pressure.

5. Aug 31, 2011

### quietrain

ok thank you!