Is this correct?

Question

Is this correct?

nvidiaintely · Answer

What would be the volume in liters of an ideal gas, if a 0.425 mole sample of the gas had a temperature of 900 degrees Celsius at a pressure of 3.00 atmospheres? (The ideal gas constant is 0.0821 L•atm/mol•K.)
		
10.468 L
		
13.643 L      X
		
28.471 L
		
40.929 L

nvidiaintely · Answer

@sweetburger

nvidiaintely · Answer

@phi @pooja195 @Loser66 @whpalmer4 @sammixboo @AloneS @kidrah69

phi · Answer

off-hand, I don't remember the details of the gas law.
what formula do you use ?

nvidiaintely · Answer

900*C = 1173 K 
3.00atm = 303.98kPa 

pV = nRT 
V = (nRT)/p 
= (0.425 x 8.31 x 1173)/303.98 
= 13.629L

nvidiaintely · Answer

That's how I got the answer ^^^

phi · Answer

yes, that looks good.

nvidiaintely · Answer

Okay, thanks!

phi · Answer

but I'm not sure why you changed to kPa??

n is in units of L*atm/(mol*K)
so the calculation is
$$ V= 0.0821 \frac{ L \ \cancel{atm}}{\cancel{mol} \ \cancel{K}} \cdot 0.425 \cancel{mol} \cdot 1173 \cancel{K}\cdot \frac{1}{3 \cancel{atm}}$$