The amount of heat lost by the air in the football and

The amount of heat lost by the air in the football and the gauge pressure of air in the football at the stadium respectively equal

P₁V₁ = mRT₁
m = 6.049 × 10–3kg
Q = mC_v dT
Q = –43.43J
P₂V₁ = mRT₂
P₂ = 1.93 bar (absolute)
P₂ = 1 – 1.93
P₂ = 0.93 bar