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A mass of at a temperature of 40 degrees Celsius and pressure of 2 bar is trapped in a cylinder behind a leak-proof piston. The temperature of the gas is to be increased to 65 degrees celsius while its pressure is to be decreased to 1.25 bar. Describe how this change of state could be brought about in a quasi-equilibrium manner. You may make use of any external devices required and also make any assumptions about the walls of the cylinders.

A mass of at a temperature of 40 degrees Celsius and pressure of 2 bar is trapped in a cylinder behind a leak-proof piston. The temperature of the gas is to be increased to 65 degrees celsius while its pressure is to be decreased to 1.25 bar. Describe how this change of state could be brought about in a quasi-equilibrium manner. You may make use of any external devices required and also make any assumptions about the walls of the cylinders.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A mass of at a temperature of 40 degrees Celsius and pressure of 2 bar is trapped in a cylinder behind a leak-proof piston. The temperature of the gas is to be increased to 65 degrees celsius while its pressure is to be decreased to 1.25 bar. Describe how this change of state could be brought about in a quasi-equilibrium manner. You may make use of any external devices required and also make any assumptions about the walls of the cylinders.

P1.4 A gas is contained in a cylinder behind a frictionless piston of diameter 0.1 m and mass 25 kg. When an additional mass M is placed on the piston the gage pressure of the gas becomes 2.0 bar. The local barometric pressure is 775 mm of mercury. (a) Calculate (i) the mass of M and (ii) the absolute pressure of the gas in the cylinder. (b) The piston is held in this position with the aid of a lock on the outside while heat is supplied to the gas until its absolute pressure becomes 4 bar. Calculate the force on the lock in the final equilibrium state. [Answers: (a) (i) 135 kg, (ii) 3.034 bar, (b) 758 N]
Transcribed Image Text:P1.4 A gas is contained in a cylinder behind a frictionless piston of diameter 0.1 m and mass 25 kg. When an additional mass M is placed on the piston the gage pressure of the gas becomes 2.0 bar. The local barometric pressure is 775 mm of mercury. (a) Calculate (i) the mass of M and (ii) the absolute pressure of the gas in the cylinder. (b) The piston is held in this position with the aid of a lock on the outside while heat is supplied to the gas until its absolute pressure becomes 4 bar. Calculate the force on the lock in the final equilibrium state. [Answers: (a) (i) 135 kg, (ii) 3.034 bar, (b) 758 N]
P1.4 A gas is contained in a cylinder behind a frictionless piston of diameter 0.1 m and mass 25 kg. When an additional mass M is placed on the piston the gage pressure of the gas becomes 2.0 bar. The local barometric pressure is 775 mm of mercury. (a) Calculate (i) the mass of M and (ii) the absolute pressure of the gas in the cylinder. (b) The piston is held in this position with the aid of a lock on the outside while heat is supplied to the gas until its absolute pressure becomes 4 bar. Calculate the force on the lock in the final equilibrium state. [Answers: (a) (i) 135 kg, (ii) 3.034 bar, (b) 758 N]
Transcribed Image Text:P1.4 A gas is contained in a cylinder behind a frictionless piston of diameter 0.1 m and mass 25 kg. When an additional mass M is placed on the piston the gage pressure of the gas becomes 2.0 bar. The local barometric pressure is 775 mm of mercury. (a) Calculate (i) the mass of M and (ii) the absolute pressure of the gas in the cylinder. (b) The piston is held in this position with the aid of a lock on the outside while heat is supplied to the gas until its absolute pressure becomes 4 bar. Calculate the force on the lock in the final equilibrium state. [Answers: (a) (i) 135 kg, (ii) 3.034 bar, (b) 758 N]
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