Questions 28 and 29 are based on the following physical

Last updated: 6/10/2023

Questions 28 and 29 are based on the following physical situation A hollow cylinder made of a thermally insulating material is equipped with a horizontal piston P of mass m and area A The piston is also made of a thermally insulating material There is no friction between inner surface of the cylinder and the piston Above the piston a liquid of density p is filled up to brim of the cylinder The piston is supported at the position shown due to pressure of an ideal gas filled in the lower portion of the cylinder Number of moles of the gas is n atmospheric pressure is po and initial temperature of the gas is To The heater H is switched on 28 Work done by the gas on the piston is a pgh A mgh PhA 0 5pgh A mgh 29 Final temperature of the gas is Po pgh Po PA pghA mg nA mo a 27 s 27 b pohA pgh A mgh d 0 5 p hA pgh A mgh b 27 21 Po Po pgh PA mg PA pghA mg h P H oooooo