The piston of a vertical piston-cylinder device containing a gas has a mass of 60 kg and a cross-sectional area 0.04 m2. The entire system is placed in a vacuum chamber. If temperature of the gas is 70o C. What is the pressure of gas inside the cylinder? g = 9.8 m/s2
0.7 bar
0 bar
0.3 bar
0.147 bar
0.147 bar
Given:
Piston mass
(m) = 60kg
Piston
cross sectional area (A) = 0.04m2
Temperature
of gas (T) = 70o C
Acceleration due to gravity (g) = 9.8 m/ sec2
Final pressure of gas inside the cylinder = Atmospheric pressure acting on the piston + Pressure acting due to piston on gas
P final = P atm + P piston
According
to question, the entire system is placed in a vacuum chamber. Therefore, P atm
..Method 2..
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