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Alexis Robles 2k wrote:What is the R constant in PV=nRT, I keep hearing there are different R constant and I am confused about that?
For the Ideal Gas Law (PV=nRT), R= 8.314J/molK, which is the universal gas constant. I believe there is also differing R constants depending on units used. I found the section "The Gas Constant (R)" on this website to be helpful!
The R constant will be provided on the "Constants and Formulas" worksheet which can be found on the 14B class website and will be provided on tests and midterms, so we will not have to remember it. The constant can change depending on what units it is in, but different unit forms are also provided on the formula sheet.
In many of our examples and homework problems, the R constant is 8.314 J/mol·K, but if you look at Dr. Lavelle's constants and equations sheet, R is the gas constant and actually has different values. The R value you use depends on the units that are given in the problem.
8.314 J/mol·K is the most common used form for the R gas constant, but there are other types of numbers given for it depending on the units. I would suggest memorizing this number just in case the formula sheet has a different value on it since this is the most common used form of it used in our problems
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