# Adiabatic Expansion - Need help getting started

1. Jan 17, 2004

### Skyblitz

Hi, I just need help getting started on a question.. I'm not even sure where to begin:

It is desired to ignite a gas at 1000 degrees celcius by compressing it adiabatically to 27 degrees celcius.

a) by what ratio must its volume be changed?

I'm not really sure how to approach this question since it seems so little information is given. Any help is appreciated!

2. Jan 17, 2004

### himanshu121

What type of gas it is

Is it a monoatomic Or diatomic or polyatomic

$$P_1V_1^{\gamma}=P_2V_2^{\gamma}$$

For ideal gas

PV=nRT

3. Jan 18, 2004

### Skyblitz

Hm, it does not say

4. Jan 18, 2004

### himanshu121

Is the name of gas stated

5. Jan 18, 2004

### Skyblitz

Unfortunately not.. what I posted in the first message is all that it says. :\

6. Jan 18, 2004

### himanshu121

At such an high temp u can assume it to be in dissociated form