Ideal gas law

[Jineava_To_3N]

What does each variable in the ideal gas law(PV=nRT) stand for and is there a constant value for it (for example, is there a value for R or T we must know to solve the problem?

[Christine_Mavilian_3E]

Here is what each variable in the Ideal Gas Law (PV=nRT) stands for:

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

With respect to temperature, the units must always be in K (Kelvin). Convert to Kelvin if a given temperature in the problem is not in Kelvin.
With respect to your gas constant, there are different constant values depending on the different units of pressure (i.e. atm, bar ,etc.). Typically you should be able to determine which one to use based on the Pressure value that is given in the problem. The different gas constants are located behind the laminated Periodic Table of Elements that came with the course reader.

As a side note: if there is a problem that asks you to find the pressure, and unless you are told otherwise, you would typically use the Gas Constant that has atm which in this case is (0.0821 L*atm/(mol*K), because atm is the standard unit for pressure.

[HarshiniMuthukumar3N]

P is the pressure of the gas, V is the volume, n is the amount of substance of gas (the moles), R is the gas constant and its numerical value changes depending on the units of the other values and is usually given on the formula sheet. T is the temperature of the gas.