Final answer:
The average kinetic energy of the gas particles increases as the temperature is increased.
Step-by-step explanation:
The average kinetic energy of the gas particles increases as the temperature is increased from 20°C to 313°C. This is because temperature is directly proportional to the average kinetic energy of gas molecules. When the temperature increases, the gas molecules move faster and have more energy, resulting in an increase in their average kinetic energy.