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value of R?

Posted: Mon Jan 28, 2019 9:17 pm
by Saachi_Kotia_4E
what is the value of the constant R? in one of the homework problems, we used R=0.08206 in the n=PV/RT formula, but then we used R=8.314 in the w=-nRTlnV1/V2 formula. why is the value of R different?

Re: value of R?

Posted: Mon Jan 28, 2019 9:19 pm
by 405161024
R is specific to each gas, it is a constant that is given

Re: value of R?

Posted: Mon Jan 28, 2019 9:20 pm
by Jessica Chen 1F
R is 0.08206 in the PV=nRT formula because its units are L atm K-1 mol-1 in that case.
R is 8.314 in the w=-nRTlnV1/V2 formula because its units are J K-1 mol-1 in that case.

Re: value of R?

Posted: Tue Jan 29, 2019 4:05 pm
by Amy Dinh 1A
The values of constant R are different due to the different units shown in each equation.

Re: value of R?

Posted: Sun Feb 03, 2019 8:47 pm
by Vanadium Wang 4H
Depending on the question, the gas constant, R = 8.314 J*K-1*mol-1 = 8.206*10-2 L*atm*K-1*mol-1 = 8.314*10-2 L*bar*K-1*mol-1 = 62.364 L*Torr*K-1*mol-1