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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}