# Finding Volume of gases!

1. Nov 13, 2004

### parwana

A balloon is filled to a volume of 63.0 mL at a temperature of 58.0oC.
The balloon is then heated up at constant pressure to a temperature of 93.0oC.
What is the final volume of this balloon, in liters?

We havent even covered this yet in chem, but for some reason they are giving this as a hw problem, help please!

2. Nov 13, 2004

### pack_rat2

Do you know the "ideal gas law"?

3. Nov 13, 2004

### mrjeffy321

to figure this out use

CHARLES'S LAW:
V1 = T1
V2 T2

you know both the initial and final volumes and the initial and final tempertatures, just plug them into the equation, but remember that temerature is in Kelvins, not C and definatly not F.
to get Kelvins from C, add 273.

here is a page that explain all the gas laws in more detail:
http://www.chemtutor.com/gases.htm

4. Nov 14, 2004

### chem_tr

Charles' Law is okay, but if you find it hard to memorize all of the equations, then just use $\displaystyle P\times V = n\times R\times T$, but omit pressures, mole amounts, and Rydberg's constant, so what you'll get is plain Charles' Law.

5. Nov 14, 2004

### Sirus

I agree. I never memorized all the relationships between P, V, and T; they are all in the ideal gas law (memorize that, though).

6. Nov 23, 2004

### pack_rat2

But you can use R if you like! ;) (R = F + 460)