Final answer:
Doubling the average kinetic energy of a sample doesn't change the temperature. The Kelvin temperature is doubled in this scenario.
Step-by-step explanation:
When the average kinetic energy of a sample is doubled, the temperature doesn't change. The average kinetic energy of a gas sample is directly proportional to its temperature, as per the kinetic theory of gases. This means that doubling the average kinetic energy would result in the temperature doubling as well.
The Kelvin temperature scale directly reflects the average kinetic energy of a gas sample. Hence, the correct answer is option b. The Kelvin temperature is doubled.
Learn more about average kinetic energy and temperature