## PV=nRT

$PV=nRT$

Andrea_Torres
Posts: 98
Joined: Sun Sep 15, 2019 12:15 am

### PV=nRT

What does each letter stand for?

Charysa Santos 4G
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### Re: PV=nRT

P = Pressure, V = Volume, n = number of moles, R = gas constant, and T = Temperature

KarineKim2L
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

### Re: PV=nRT

P stands for pressure, V for volume, n for the moles of gas, R is a constant, T is the temperature.

Samuel Tzeng 1B
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

### Re: PV=nRT

P is pressure, V is volume, n is # of moles of gas, R is the gas constant, T is temperature

Jesalynne 2F
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

### Re: PV=nRT

P is pressure, V is volume, n is the number of moles, R is the gas constant (it'll be given to us on the equations and constants sheet), and T is temperature.

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: PV=nRT

P is pressure in atm, V is volume in liters, n is the number of moles, R is the gas constant 8.206 x 10-2 L·atm·K-1·mol-1, and T is the temperature in Kelvin.

Anokhi Patel 2B
Posts: 76
Joined: Fri Aug 09, 2019 12:17 am

### Re: PV=nRT

P is pressure, V is volume, n is the number of moles, R is Rydberg's gas constant, and T is temperature.

san_2F
Posts: 118
Joined: Sat Jul 20, 2019 12:15 am

### Re: PV=nRT

P= pressure, V=volume, n=moles, R=gas constant, T=temperature

EllieSchmidtke_4I
Posts: 51
Joined: Wed Feb 20, 2019 12:16 am

### Re: PV=nRT

P=pressure, v=volume, n=moles of gas, R=the gas constant, T=temperature

Rosa Munoz 2E
Posts: 105
Joined: Wed Sep 18, 2019 12:21 am

### Re: PV=nRT

Pressure Volume = moles R is a constant T temperature

WGaines_2E
Posts: 47
Joined: Mon Nov 18, 2019 12:18 am

### Re: PV=nRT

P=Pressure
V=Volume
n= #moles
R= gas constant
T= temp

Philip
Posts: 100
Joined: Sat Sep 07, 2019 12:16 am

### Re: PV=nRT

Pressure times Volume = moles of gas times the gas constant times the temperature

Leslie Almaraz 4G
Posts: 99
Joined: Fri Aug 02, 2019 12:16 am

### Re: PV=nRT

when do you know you are allowed to use this formula?

jessicasilverstein1F
Posts: 122
Joined: Wed Sep 30, 2020 9:57 pm

### Re: PV=nRT

P = Pressure
V = Volume
n = number of moles
R = gas constant (in Kelvin)
T = Temperature (in Kelvin)

make sure all in right units

Posts: 97
Joined: Wed Sep 30, 2020 9:37 pm
Been upvoted: 2 times

### Re: PV=nRT

You'll probably be using this formula whenever the question asks for one of the variables (pressure, volume, number of moles, or temperature) in relation to a gas and gives information that will help you derive the other variables in order to solve it

Joseph_Armani_3K
Posts: 72
Joined: Wed Sep 30, 2020 9:58 pm

### Re: PV=nRT

P = pressure
V = volume
n = moles
R = gas constant (around 0.08206 I believe)
T = temperature in Kelvin

Joshua Swift
Posts: 85
Joined: Wed Sep 30, 2020 9:50 pm

### Re: PV=nRT

P=pressure
V=volume
n=moles
R=universal gas constant
T=temperature

Morgan Gee 3B
Posts: 90
Joined: Wed Sep 30, 2020 9:48 pm

### Re: PV=nRT

P = pressure
V = volume (usually in liters)
n = moles
R = gas constant
T = temperature (usually in kelvin)

Make sure to be extra careful with units as there are different gas constants based on the different units used for the pressure. For example, there is a different gas constant depending on if the desired or given pressure is atm, bars, etc. Additionally, make sure to convert volumetric units to liters as our gas constants always use liters. Temperature in the gas constant is always in kelvin, while questions may be given in either celsius or kelvin (probably not fahrenheit). To get kelvin from celsius, just add 273.

Ximeng Guo 2K
Posts: 96
Joined: Wed Sep 30, 2020 9:54 pm

### Re: PV=nRT

P = Pressure
V = Volume
n = # of moles
R = gas constant
T = Temperature (in K)

Bella Bursulaya 3G
Posts: 133
Joined: Wed Sep 30, 2020 9:54 pm

### Re: PV=nRT

P is pressure, and the SI unit is Pascals but often we use bar or atm (be careful to look out for this because it will change which gas constant R you use)
V is volume in liters or m^3
n is the moles
R is the gas constant (varies with pressure and volume)
T is the temperature (in Kelvin)
conversion is K = C˚ + 273.15

Megan ODonnell 3F
Posts: 86
Joined: Wed Sep 30, 2020 9:39 pm

### Re: PV=nRT

P= pressure
V= volume
n= number of moles
R= gas constant
T = temperature

Samantha Lee 1A
Posts: 98
Joined: Wed Sep 30, 2020 10:05 pm
Been upvoted: 1 time

### Re: PV=nRT

P= pressure (units: atm)
V = volume ((units: Liters)
n = (units: mols)
R = constant (units: L atm mol-1K-1)
T = temperature ((units: Kelvin)

* The units are very important for the equation. Make sure that temperature is in Kelvin, volume is in Liters, and pressure in atm. Those are usually the ones that can be given in different units in problems.

FionaHunter21
Posts: 91
Joined: Wed Sep 30, 2020 9:37 pm

### Re: PV=nRT

So is R the same constant as the one we used before on the equation sheet?

Kaili Valenzuela 2B
Posts: 86
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

FionaHunter21 wrote:So is R the same constant as the one we used before on the equation sheet?

No the R constant on the equation sheet we have is in hertz which is not useful to us when using this equation so the R constant in this case could be 0.08205746 L⋅atm/mol⋅K but could be different depending what units you use.

Alexandra Ahlschlager 1L
Posts: 86
Joined: Wed Sep 30, 2020 9:59 pm

### Re: PV=nRT

Leslie Almaraz 4G wrote:when do you know you are allowed to use this formula?

You would be using this formula if you want to convert between partial pressures and concentrations. For example, if the problem asks you to solve for Kc but you are only given partial pressures, you can plug these values into the equation to get their concentrations (n/V) and solve for Kc. Hope this helps!

SalmaQ
Posts: 41
Joined: Wed Nov 23, 2016 3:02 am

### Re: PV=nRT

Leslie Almaraz 4G wrote:when do you know you are allowed to use this formula?

Hey Leslie,
Just like Alexandra said, you can use this idea gas formula to convert from the concentration Kc to the partial pressure Kp, and vise versa. In order to do that, you would divide V (the volume) by both sides to isolate the P (or Kp); which looks like P=(n/v)RT. From there, n/v basically would be the concentration Kc, which is were you would plug in the Kc in order to find Kp.

I hope this helps!!!

Joey_Okumura_1E
Posts: 116
Joined: Wed Sep 30, 2020 9:58 pm

### Re: PV=nRT

P = pressure in atm
V = volume in L
n = amount of substance in moles
R = gas constant (0.08206 J*K[*]-1 M[*]-1)
T = temperature in Kelvin

SalmaQ
Posts: 41
Joined: Wed Nov 23, 2016 3:02 am

### Re: PV=nRT

FionaHunter21 wrote:So is R the same constant as the one we used before on the equation sheet?

Hey Fiona, the R constant would be gas constant which is 0.082057 L atm mol^-1 K^-1.

Hope this helps!

Yeonjoo Kim 2B
Posts: 14
Joined: Wed Sep 18, 2019 12:17 am

### Re: PV=nRT

P=Pressure
V=Volume
n=Number of moles-Fixed
R=Gast Constant
T=Temperature (Kelvin)-Fixed

Jiapeng Han 1C
Posts: 85
Joined: Wed Sep 30, 2020 9:50 pm

### Re: PV=nRT

P=pressure
V=volume
n=number of moles
R=constant(8.314J/(mol*K))
T=temperature

Lily Anne Garcia 1C
Posts: 80
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

pressure, volume, number of moles, constant, tempurature

Nina Fukui 2J
Posts: 96
Joined: Wed Sep 30, 2020 9:43 pm

### Re: PV=nRT

P=pressure
V=volume of gas
n= number of moles
R= universal gas constant
T= temperature

Mingzi Yang 1E
Posts: 85
Joined: Wed Sep 30, 2020 9:53 pm

### Re: PV=nRT

P=pressure (in atm)
V=volume of gas (in L)
n= number of moles
R= gas constant
T= temperature (in Kelvin)

n/V = concentration

Tobie Jessup 2E
Posts: 84
Joined: Wed Sep 30, 2020 10:02 pm

### Re: PV=nRT

Thanks everyone! ^

Posts: 80
Joined: Wed Sep 30, 2020 9:48 pm

### Re: PV=nRT

P = pressure
V = volume
n = # of moles
R = gas constant
T = temperature

Matlynn Giles 2E
Posts: 88
Joined: Wed Sep 30, 2020 10:10 pm
Been upvoted: 1 time

### Re: PV=nRT

Pressure, Volume, # of moles, gas constant, temperature

Nan_Guan_1L
Posts: 84
Joined: Wed Sep 30, 2020 9:59 pm

### Re: PV=nRT

P = Pressure (in atm)
V = Volume (in L)
n = # of moles
R = gas constant
T = Temperature (in K)

remember to use SI units!

305572629
Posts: 86
Joined: Wed Sep 30, 2020 9:41 pm

### Re: PV=nRT

P= pressure (atm); V= volume (Liters); n=moles; R=gas constant (no units needed); T=temperature (Kelvin)

Hasan Mirza 3F
Posts: 85
Joined: Wed Sep 30, 2020 10:00 pm

### Re: PV=nRT

Pressure * Volume=n(Moles) * R(Gas Constant 8.314 J/mol·K) * Temperature(Kelvin)

Ethan Goode 2H
Posts: 122
Joined: Wed Sep 30, 2020 9:51 pm

### Re: PV=nRT

P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature.

Colin Squire 3B
Posts: 85
Joined: Wed Sep 30, 2020 9:35 pm

### Re: PV=nRT

P=pressure, V=volume, n=number of moles, R= gas constant, T= temperature

joshtully
Posts: 87
Joined: Wed Sep 30, 2020 9:36 pm

### Re: PV=nRT

P is pressure, V is volume, n is number of gaseous moles, R is the gas constant, T is temperature in Kelvin.

Aria Movassaghi 1A
Posts: 97
Joined: Wed Sep 30, 2020 9:40 pm

### Re: PV=nRT

P is Pressure, V is Volume, n is number of moles, R is the gas constant, and T is Temperature

Ashley Wagner 2A
Posts: 36
Joined: Wed Sep 30, 2020 9:32 pm

### Re: PV=nRT

P=Pressure (atm)
V=Volume (L)
n=number of moles
R=gas constant
T=temperature (K)

Chinmayi Mutyala 3H
Posts: 90
Joined: Wed Sep 30, 2020 9:50 pm

### Re: PV=nRT

P: pressure
V: volume
n: moles
R: R constant
T: temperature

Justin Zhang_1A
Posts: 85
Joined: Wed Sep 30, 2020 9:48 pm

### Re: PV=nRT

P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is the temperature.

Zihan Liu 2K
Posts: 15
Joined: Tue Jan 14, 2020 12:15 am

### Re: PV=nRT

P = pressure, V = volume, n = number of moles, R = constant, T = temperature in Kelvin (I always forgot that T should be in K haha)

Jaclyn Schwartz 1I
Posts: 94
Joined: Wed Sep 30, 2020 9:45 pm

### Re: PV=nRT

P is for pressure, V is for volume, n is number of moles of gas, R is the gas constant, T is for temperature

sabrina ghalambor 2J
Posts: 92
Joined: Wed Sep 30, 2020 9:35 pm

### Re: PV=nRT

P is pressure, V is volume in liters, n is moles, R is a constant (that changes depending on the unit of pressure), and T is temperature (in Kelvin)

Sean Phen
Posts: 102
Joined: Wed Sep 30, 2020 10:01 pm

### Re: PV=nRT

P= Pressure, V= volume, n= number of moles, R= gas constant, and T= temperature

Raashi Chaudhari 3B
Posts: 86
Joined: Wed Sep 30, 2020 9:31 pm

### Re: PV=nRT

P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is temperature. You can manipulate this equation in several ways, one of which being P= (n/V)*RT which can also be rewritten as P=concentration*RT because (n/V) is how concentration is calculated.

sophia kosturos 2B
Posts: 36
Joined: Wed Feb 05, 2020 12:15 am

### Re: PV=nRT

P= pressure, V= volume, n= number of moles, R= gas constant, and T= temperature (in Kelvin).

Keeryth Sandhu 1H
Posts: 91
Joined: Wed Sep 30, 2020 10:04 pm

### Re: PV=nRT

P = pressure, V = volume, n = number of moles, R = gas constant, T = temperature

Ariel Guan 1H
Posts: 91
Joined: Wed Sep 30, 2020 9:36 pm
Been upvoted: 1 time

### Re: PV=nRT

P = pressure (atm)
V= Volume (L)
n = number of mols
R = gas constant (which is given)
T = temp (Kelvin)

emwoodc
Posts: 81
Joined: Fri Aug 09, 2019 12:16 am

### Re: PV=nRT

P: pressure
V: volume
n: moles
R: constant
T: temperature

Posts: 93
Joined: Wed Sep 30, 2020 9:51 pm

### Re: PV=nRT

P= pressure
V=volume
n= moles
R= gas constant
T= temperature in Kelvin

Jason Knight - 1F
Posts: 101
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

Pv=nRT
P = pressure, v = volume, n = moles, R = gas constant, T = temperature in Kelvin.

Alen Huang 2G
Posts: 92
Joined: Wed Sep 30, 2020 9:50 pm

### Re: PV=nRT

P=pressure, v= volume, n= number of moles, R= gas constant, T=temperature

MariaCassol1L
Posts: 37
Joined: Wed Nov 13, 2019 12:18 am

### Re: PV=nRT

P= pressure in atm
V= volume in liters
n= number of moles
R= gas constant (8.31446261815324 J⋅K−1⋅mol−1)
T= temperature in Kelvin

Brenda Silva 1B
Posts: 86
Joined: Wed Sep 30, 2020 9:41 pm
Been upvoted: 1 time

### Re: PV=nRT

P=pressure, V=volume, n=number of moles, R= gas constant, and T= temperature

chinmayeec 2H
Posts: 87
Joined: Wed Sep 30, 2020 9:33 pm
Been upvoted: 1 time

### Re: PV=nRT

P= pressure
V= volume (L)
n = moles of gas
R = gas constant
T = temperature (Kelvin)

Shalyn Kelly 3H
Posts: 83
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

P=Pressure in atm
V=Volume in Liters
n=number of moles
R=Gas Constant
T=Temperature (always in Kelvin cause of R's units I believe—to convert from Celsius add 273.15)

ShinwooKim_3E
Posts: 85
Joined: Wed Sep 30, 2020 10:00 pm

### Re: PV=nRT

P=pressure
V=volume
n=moles
R=gas constant
T=temperature

Sukhkiran Kaur 3I
Posts: 89
Joined: Wed Sep 30, 2020 10:03 pm

### Re: PV=nRT

P= pressure, V=volume, n=moles, R= Rydeberg's gas constant, T=temperature

Jamie2002
Posts: 100
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

P = pressure
V = volume
n = number of mols
R = gas constant
T = temperature

Lorena_Morales_1K
Posts: 39
Joined: Wed Sep 30, 2020 10:11 pm

### Re: PV=nRT

P=Pressure V=Volume n= #moles
R= gas constant
T= temp

Caelin Brenninkmeijer 1G
Posts: 85
Joined: Wed Sep 30, 2020 9:50 pm

### Re: PV=nRT

For PV=nRT,
P stands for pressure
V for volume
n for amount of moles
R for the gas constant, equaling 8.314 J/mol·K
T for temperature

vuongnaomi1L
Posts: 97
Joined: Wed Sep 30, 2020 9:56 pm

### Re: PV=nRT

P is for Pressure, V is for Volume in Liters, n is for number of moles, R is for gas constant, and T is for Temperature in Kelvin

Sam Wentzel 1F 14B
Posts: 119
Joined: Wed Sep 30, 2020 9:50 pm
Been upvoted: 1 time

### Re: PV=nRT

P = Pressure, usually given in Bars / atm
V = Volume, in Liters
n = number of mols
R = The gas constant, equal to 8.3145 J mol^-1 K^-1
T = Temperature in Kelvin

Lauren Strickland 1B
Posts: 84
Joined: Wed Sep 30, 2020 9:47 pm

### Re: PV=nRT

P= pressure
V= volume
n= number of moles
R= gas constant
T= temperature

Susan Chamling 1F
Posts: 86
Joined: Wed Sep 30, 2020 9:42 pm

### Re: PV=nRT

P = Pressure, typically in atm or bars
V = Volume, Liters
n = # of moles
R = gas constant (which I believe is provided on the equations sheet)
T = temperature, Kelvin

Samantha Lee 1A
Posts: 98
Joined: Wed Sep 30, 2020 10:05 pm
Been upvoted: 1 time

### Re: PV=nRT

P: pressure (units: atm)
V: volume (units: Liters)
n: moles (unit: mol)
R: constant (should match the other units in the equation) --> value = 8.314
T: temperature (units: Kelvin)

*It is very important to make sure you plug in the correct units into each variable in the equation. Pressure, volume, and temperature are the most missed variables because there is a higher chance that the value given in the problem will have different units.

Anna Yakura 2F
Posts: 123
Joined: Wed Sep 30, 2020 9:46 pm

### Re: PV=nRT

Does anybody know when exactly we need to use this equation? I haven't encountered it in any of the textbook problems.

Scot Widjaja Dis 1J
Posts: 75
Joined: Wed Sep 30, 2020 9:55 pm

### Re: PV=nRT

P = pressure
V = volume
n = # of moles
R = gas constant
T = temperature

Edwin Liang 1I
Posts: 85
Joined: Wed Sep 30, 2020 9:34 pm

### Re: PV=nRT

P stands for Pressure, V stands for Volume, n stands for number of moles, R stands for gas constant, T stands for temperature.