Final answer:
The final Kelvin temperature of the gas will be halved in relation to the initial temperature due to the direct proportionality between volume and temperature in Kelvin according to Charles's law.
Step-by-step explanation:
When an experiment involves a change in the temperature of a gas at constant pressure resulting in the volume being halved, it relates to one of the gas laws known as Charles's law. Charles's law states that, at constant pressure, the volume of a gas is directly proportional to its temperature in Kelvin.
Hence, if the volume of a gas is halved, according to Charles's law, the Kelvin temperature would also be halved. This means that the final Kelvin temperature is half of the initial Kelvin temperature.
As such, when working in Celsius, we need to convert to Kelvin to apply Charles's law accurately, so if we were given the initial temperature in Celsius, the equivalent Kelvin temperature would have to be calculated first before halving.