# How do i solve this constant volume thermo problem?

I have been struggling for weeks on this thermo problem.

A volume of air (assuming ideal gas)

P1 = 1 bar

P2 = ???

T1 = 300K

T2 = 700K

V1 = V2

M1 = M2

i have a chart that relates temperature in Rº to sº (Btu/lbm*R)

what steps do i take to solve this problem???

I am supposed to be able to do it without moles, using instead the imperial formula for ideal gases (pV=mRT i think)

How do i write the conservation of energy for this?

Are equations are needed to solve for pressure here?

What is the Heat Transfer and Work for each process?

http://home.engineering.iastate.edu/~jonjack/Air_T...

thank you sooo much for any help!

The initial volume, V1, is equal to the final volume, V2

### 1 Answer

- gintableLv 710 years agoFavorite Answer
You never gave us any piece of information of the amount of gas in this problem. How do I know whether it is the size of a motorcycle engine's piston/cylinder assembly or the size of a house?

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