Question

A 0.073-m3 piston-cylinder device contains 0.15 kg of Argon. Weights are placed on top of the piston so that the initial pressure inside the cylinder is at 335 kPa. Now weights are removed one-by-one until the final volume is 3.00 times that of the initial volume. During this process, the argon's temperature is maintained constant. Determine the final pressure in the device. Round your answers to one decimal place. kPa

Answer 1

STEP-I (write given data)

Given:

Initial volume of the cylinder, V₁ = 0.073 m³

mass of argon = 0.15 kg

Initial pressure P₁ = 335 kPa

Final volume V₂ = 3 V₁

STEP-II (Calculation)

Now, Since the temperature is constant (Isochoric process)

P₁V₁ = P₂V₂

335 x 0.073 = P₂ x 3 x 0.073

P₂ = 111.66 kPa

STEP-III (Conclusion)

The final pressure is P₂ = 111.66 kPa