Answer:
(i) The pressure exerted by the piston on the gas in the chamber can be calculated using the formula:
Pressure = Force / Area
The force exerted by the piston on the gas is equal to its weight, which can be calculated as:
Force = mass x gravitational acceleration
= 3.5 kg x 9.81 m/s^2
= 34.335 N
The area of the piston is 450 cm^2, which is equal to 0.045 m^2.
Therefore, the pressure exerted by the piston on the gas is:
Pressure = Force / Area
= 34.335 N / 0.045 m^2
= 763 N/m^2 or 763 Pa
(ii) The work done when the cylinder is heated at a constant pressure of 1 atm can be calculated using the formula:
Work = Pressure x Change in Volume
The initial volume of the cylinder is Vo, and the final volume is 3Vo. Therefore, the change in volume is:
Change in Volume = 3Vo - Vo
= 2Vo
The pressure is given as 1 atm, which is equal to 101,325 Pa.
Therefore, the work done is:
Work = Pressure x Change in Volume
= 101,325 Pa x 2Vo
= 202,650 Pa.Vo or 202,650 J: