Question

Why temperature is always considered in kelvin units for Charles Law?

Answer 1

Temperature:

• Temperature is a feature of matter that represents the amount of energy of motion of its constituent particles.
• It is a measure of how hot or cold a material is in comparison. Absolute zero is the coldest theoretical temperature.

Charles Law:

• Charles' Law, often known as the law of volumes, describes how a gas expands as its temperature rises. A reduction in temperature, on the other hand, will result in a decrease in volume.
• When we compare a substance under two different situations, we can use the aforementioned statement to write it as follows:${\mathrm{V}}_1{\mathrm{T}}_2={\mathrm{V}}_2\mathrm{T}1$

Temperature is always considered in kelvin units for Charles Law:

• Kelvin is an absolute temperature scale.
• A gas with a temperature of $10\mathrm{K}$ has half the heat energy of a gas with a temperature of $20\mathrm{K}$. This is not true when comparing a gas at $10$ degrees Celsius to gas at $20$ degrees Celsius
• If the temperature would be in Celsius, it would not be possible to have gas at a temp of $0°\mathrm{C}$ which is not true in reality.
• At $0\mathrm{K}$, all particle movement stops so the substance could not be in the gaseous state, it would be solid.
• The gas laws are only applicable in the range of T and P where substances will exist in the gas state