Ideal Gas Law problems

1. Jan 21, 2013

Azareus

1.A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 493cm^3 of air at atmospheric pressure (1.01*10^5 Pa) and a temperature of 27.0 degress celcius . At the end of the stroke, the air has been compressed to a volume of 47.0cm^3 and the gauge pressure has increased to 2.80*10^6 Pa .

Q)Compute the final temperature in degrees celcius

When I do this problem I change celcius to kelvins and set up the equation in the form T2=P2*V2*T1/(P1*T2) and get and answer of 792.8825337 which i then convert back into celcius for a total of 519.8825337 degrees celcius. I have tried that number 520 to no avail. I have no hints from mp, I am just told that I am wrong. Maybe I just need to sleep on it, but any help as to what my error is would be greatly appreciated.

2. Jan 22, 2013

SteamKing

Staff Emeritus
What's the definition of gauge pressure?

3. Jan 22, 2013

Azareus

... le sigh. Thanks.