Posted by **blah** on Sunday, January 25, 2009 at 11:49am.

The instruction booklet for your pressure cooker indicates that its highest setting is 13.5psi . You know that standard atmospheric pressure is 14.7psi , so the booklet must mean 13.5psi above atmospheric pressure. At what temperature will your food cook in this pressure cooker set on "high"?

I tried: PV=nRT

V, n, R = constant

P = T

P1/T1 = P2/T2

P1=14.7psi

T1 = 20C

P2 = 14.7+13.5 psi

T2= ?

But I am not getting the correct value am I using the correct equation or should i be using ln(P1/P2)=change in heat vapor/R * (1/T2 - 1/T1)

Thanks

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