Variables

$PV=nRT$

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Jarrett Peyrefitte 2K
Posts: 79
Joined: Sat Aug 24, 2019 12:16 am

Variables

What does each variable/letter represent in the equation PV = nRT?

Amy Pham 1D
Posts: 88
Joined: Fri Aug 09, 2019 12:15 am

Re: Variables

P=partial pressure of the gas
V=volume of container
n=mols of substance
R=ideal gas constant
T=temperature

You would use this equation in our context to convert between partial pressures and concentrations (n/V) of reactants and products to be used in calculating equilibrium constants.

sarahforman_Dis2I
Posts: 93
Joined: Sat Aug 17, 2019 12:18 am

Re: Variables

Jarrett Peyrefitte 2K wrote:What does each variable/letter represent in the equation PV = nRT?

P is pressure, V is volume, n is the number of moles, R is the gas constant (the values should be given to us), and T is temperature in K.

It is important to note that the units on P will determine what value of R is used (whether that be atm, bars, Pa ext). In short, make sure your units cancel!
I hope this helps

Luc Zelissen 1K
Posts: 42
Joined: Mon Jun 17, 2019 7:23 am

Re: Variables

If a question gives you concentration you can still use the equation, because (n/V)= concentration, where n is number of moles and V is volume. moles/volume is molarity and that is concentration

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