A football official inflates a football to the required gauge pressure of 13 psi prior to a game. The football has an internal volume of 160in^3 and the air is at a temperature of 75 degrees F when the football is first inflated. The ball is taken onto the field, and by the time it is put into play air temperature inside the ball decreased to 30 degrees F
Assuming that the football doesn’t leak and that the volume of the football doesn’t change significantly during the cooling process, calculate the following quantities:
A) The pressure of the air in the ball when play begins
B) The amount of heat transfer from the ball during the cooling process
C) The initial pressure to which the ball must be inflated so that it will be at the required 13 psi gauge pressure when the temperature reaches 30 degrees F