Question

what temperature scale is used in gas law calculations?

Explanation:

Gas laws are part of physics. In gas law calculations, the Kelvin scale is used. This is because the Kelvin scale is an absolute temperature scale. Zero on the Kelvin scale represents absolute zero, the lowest possible temperature where molecular motion theoretically stops. Using an absolute scale is crucial for gas law equations like the ideal gas law ($PV = nRT$), where $T$ (temperature) must be in Kelvin for the relationships to hold true. For example, if we used a non - absolute scale like Celsius, negative temperatures could lead to unphysical results in gas law calculations.

Answer:

The Kelvin scale.