The absolute pressure inside the ball is 1.25atm.
Step-by-step explanation:
Given-
Volume, V = 5..27L
Temperature, T = 27°C
Gauge Pressure, Pg = 0.25 atm
Atmospheric pressure, Patm = 1 atm
Absolute pressure, Pabs = ?
We know,
![Pabs = Pg + Patm\\\\\\Pabs = 0.25 + 1 atm\\\\Pabs = 1.25atm](https://img.qammunity.org/2021/formulas/chemistry/middle-school/pf3e5etaysggvvry68npx1xscrey9wwd3s.png)
Therefore, absolute pressure inside the ball is 1.25atm.