Final answer:
To have the same gas occupy 360 ml instead of 210 ml, the temperature must be increased in accordance with Charles's Law, which indicates that gas volume and temperature are directly proportional when pressure is held constant.
Step-by-step explanation:
To determine whether temperature should be increased or decreased to cause a given volume change in a gas, we can reference Charles's Law. This law states that at constant pressure, the volume of a gas is directly proportional to its temperature in Kelvin. Accordingly, to increase the volume of a gas from 210 ml to 360 ml, the temperature must be increased. Since the volume increases, the temperature must also increase to maintain the direct proportionality as stated by Charles's Law. As demonstrated in examples from the provided reference material, an increase in temperature from 283 K to 303 K resulted in a volume increase from 0.300 L to 0.321 L. Therefore, for the gas mentioned in the question, to expand from 210 ml to 360 ml, the temperature must be raised from -73°C, which is 200 K, to a higher temperature.