What units must be used to express the temperature in the equation for the ideal gas law? explain?

The ideal gas equation is pV = nRT.

Where T represents the temperature in abolute scale.

This is you have to use Kelvin scale (in the International System of SI).

So, when you have the temperature in farenheit or celsius scales, which are not absolute, you need to make the conversion.

For expample, for celsius degrees you have to add 273.15, becuase Kelvin temperature = celsius temperature + 273.15.

The ideal gas law within physics states the following relation: PV=nRT. In this equation, P is the pressure, V is the volume, n is the number of moles, R is the gas constant and T is the absolute temperature which is measured in units of Kelvin. To convert from degrees Celsius to Kelvin, add 273.15. For example, 20 degrees Celsius is equal to 293.15 Kelvin.