Answer: The information missing from the following question is the initial temperature of the small ball before it increases by 20°C. In order to calculate the final pressure when the temperature increases, we need to know the initial temperature, the initial pressure, and the volume of the ball (or information about the amount of gas and the gas law applicable). Without the initial temperature, we cannot determine the final pressure using the ideal gas law.
The ideal gas law is given by:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles of gas
R = gas constant
T = temperature in Kelvin
To calculate the final pressure when the temperature increases, we would need either the initial volume or the number of moles of gas in addition to the initial pressure and temperature. Without one of these pieces of information, the final pressure cannot be determined.