Answer :
Final answer:
The Celsius scale is impractical for describing gas laws because it does not start at absolute zero, making Kelvin the preferred scale for consistency in comparing gas behaviors. Therefore, the correct option is A).
Explanation:
When describing the behavior of an ideal gas, the Celsius scale cannot be used because it does not start at absolute zero, which is essential for the proportional relationship necessary to describe gas laws accurately. The Celsius scale is calibrated based on the properties of water, with 0°C as the freezing point and 100°C as the boiling point, which is an arbitrary standard for defining temperature. Instead, the Kelvin scale is used in scientific work because it begins at absolute zero, and therefore, relations like volume and pressure to temperature can be directly and consistently compared across all gases.
The mathematical relationship that shows that the volume (V) of a gas is directly proportional to its absolute temperature (T in Kelvins) is used to determine the behavior of gases. Moreover, only on the Kelvin scale does it make practical sense to say that one temperature is twice as hot as another or to describe the ratios of temperatures accurately. Therefore, the correct option is A).
