## R in PV=nRT

sallina_yehdego 2E
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### R in PV=nRT

What does the R represent in the equation PV=nRT? and what are the units?

Jesse Kuehn 1B
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Joined: Wed Nov 14, 2018 12:23 am

### Re: R in PV=nRT

It is the called the gas constant and the SI unit for it is J K^-1 mol^-1

Nathan Tran 4K
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### Re: R in PV=nRT

It's essentially a constant usually equal to 8.315 JK^-1mol^-1. I am sure it will be on our constant sheet.

Matthew Tran 1H
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Joined: Fri Sep 28, 2018 12:16 am

### Re: R in PV=nRT

Depending on the units of pressure and volume, R can take on different values. A common example is when you are given P in atm (atmospheres) and V in L (liters). In this case R=0.0821(atm*L)/(mol*K)

JiangJC Dis2K
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### Re: R in PV=nRT

R is a constant in the ideal gas law (PV=nRT) and has multiple unit derrivations that can all be found on the equations and constants sheet! So no need to memorize the value or units!

Emily Ng_4C
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### Re: R in PV=nRT

R is the gas constant and it is important to note that it differs depending on whether atm, torr, or bar is used for the pressure unit.

Felicia1E
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### Re: R in PV=nRT

Different problems will have different units, so as long as you match the unit to the corresponding R value you should be good. Here is a list with some R values:

0.0821 (atm L)/(mol K)
0.0831 (bar L)/(mol K)
8.314 (J)/(K mol)
62.36 (torr L)/(mol K) or (mmHg L)/(mol K)
1.987 (cal)/ (mol K)

Millicent Navarro 1I
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### Re: R in PV=nRT

PV=nRT is the Ideal Gas Law equation. To answer your question, the R is the ideal gas law constant and there are varying corresponding values (for the most part, problems will specify which value to use.) Some examples can include bar or atm.

705170809
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### Re: R in PV=nRT

R is gas constant, but the units can be different like atm, torr, or bar.

Brian Hom 2F
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### Re: R in PV=nRT

The ideal gas law is PV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol. It is just a constant to use in the equation.

Ahmed Mahmood 4D
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Joined: Fri Sep 28, 2018 12:28 am

### Re: R in PV=nRT

R is a constant known as the gas constant. Its units are represented as Joules . mol^-1 and various other units such as atmospheres.

ran2000
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### Re: R in PV=nRT

R is the ideal gas constant 8.314 J/(K mol)

Eva Zhao 4I
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### Re: R in PV=nRT

R is the universal gas constant, sometimes known as the Regnault constant. The value of the R constant is 8.3144598 J/mol·K.

Lizette Noriega 1H
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### Re: R in PV=nRT

R is the gas constant but it can use different units such as torr, atm, or bar

VLi_2B
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### Re: R in PV=nRT

Dr. Lavelle's website also provides the constants and formulas that we will receive for test and exams.

https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf

Daria MacAuslan 1H
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### Re: R in PV=nRT

R is the Universal Gas Constant. It is described in the textbook as well. The values can be in different units of pressure. It is 8.314 J/molK, 0.082L-atm/ molK, or 62.36L-torr/molK.

Sally Qiu 2E
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### Re: R in PV=nRT

R is a gas constant and the numerical value depends on the units being used to measure the gas

Hannah Pham
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### Re: R in PV=nRT

R is the Ideal Gas Constant which has the value of 8.314J/molK.

Angela Prince 1J
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### Re: R in PV=nRT

R is the ideal gas constant, which will probably be given to us on a test/exam.

Kylie Lim 4G
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### Re: R in PV=nRT

R is a gas constant that is on the constants and formulas sheet that we get on tests (also on Lavelle's website)
R= 8.314 J·K-1·mol-1 = 8.206 x 10-2 L·atm·K-1·mol-1 = 8.314 x 10-2 L·bar·K-1·mol-1= 62.364 L·Torr·K-1·mol-1

Edmund Zhi 2B
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Joined: Sat Jul 20, 2019 12:16 am

### Re: R in PV=nRT

There are different values and units that will vary based on the units of the other variables given in a certain equation. We will probably get these on the formula sheet just like lavelle's 14a

Anthony Hatashita 4H
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### Re: R in PV=nRT

It's a constant and should be given with any exams so I don't think we need to worry too much about it.

kausalya_1k
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Joined: Wed Nov 14, 2018 12:23 am

### Re: R in PV=nRT

The R represents the ideal gas constant.
Depending on units, it is equal to R=8.314 J·K-1·mol-1= = 8.206 x 10-2 L·atm·K-1·mol-1 = 8.314 x 10-2 L·bar·K-1·mol-1.

faithkim1L
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### Re: R in PV=nRT

R is the gas constant. I believe it will be given on the equation/constant sheet on tests.

lauraxie2e
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### Re: R in PV=nRT

it is the gas constant and can either be seen as 8.314 J/mol·K or 0.082057 L⋅atm/mol⋅K

Donavin Collins 1F
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### Re: R in PV=nRT

R is a gas constant and should be given to you on the formula sheet for tests.

Jesse Anderson-Ramirez 3I
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### Re: R in PV=nRT

R is the gas constant with a value of 8.314 (J)/((Mol)(K))

Andres Merlos 2L
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### Re: R in PV=nRT

R refers to the gas constant which depends on the units you are using for your equation.

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### Re: R in PV=nRT

Millicent Navarro 1I wrote:PV=nRT is the Ideal Gas Law equation. To answer your question, the R is the ideal gas law constant and there are varying corresponding values (for the most part, problems will specify which value to use.) Some examples can include bar or atm.

When do we use the ideal gas law equation? How does it relate to Kp?

Rosa Munoz 2E
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### Re: R in PV=nRT

The R is a constant, you can find it on the equation sheet. Just pay attention to which unit of pressure they are using.

JohannaPerezH2F
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### Re: R in PV=nRT

R is the gas constant and it equals 8.314 J / mol·K.

Matthew Chan 1B
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### Re: R in PV=nRT

R just represents the gas constant, which is 8.314 J.mol-1.K-1

Alfred Barrion 2H
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Joined: Sat Jul 20, 2019 12:16 am

### Re: R in PV=nRT

R is the gas constant, and depending on the units you have in your problem you have to choose a certain R value.
R = 8.314 J·K-1·mol-1 = 8.206 x 10-2 L·atm·K-1·mol-1 = 8.314 x 10-2 L·bar·K-1·mol-1
= 62.364 L·Torr·K-1·mol-1

Emil Velasco 1H
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### Re: R in PV=nRT

R is the gas constant, should be found on the equations sheet

Andrea_Torres
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Joined: Sun Sep 15, 2019 12:15 am

### Re: R in PV=nRT

The R in PV=nRT stands for the gas constant and its units are 8.314 J/mol·K.