Answer:
The increase in pressure of the gas is found to be 15.92 KPa
Explanation:
The additional pressure is equivalent to the pressure exerted by the weight of the mass increased over the area of piston:
Increase in Pressure = ΔP = Weight/Area
ΔP = mg/πr²
m = mass = 25 kg
g = 9.8 m/s²
r = radius of cylinder = 7 cm = 0.07 m
ΔP = (25 kg)(9.8 m/s²)/π(0.07 m)²
ΔP = 245 N/0.01539 m²
ΔP = 15.92 KPa
Therefore, the increase in pressure of gas is 15.92 KPa.
