Neco Model Questions Vol1 2019 Physics Question 7

Practice essay / theory question 7 from the 2019 Neco Model Questions Vol1 Physics examination. This question covers Pressure, Ideal gas law, Isobaric processes, Work done by a gas, Gas laws .

Neco Model Questions Vol1 2019 Physics Essay / Theory
Topics: Pressure Ideal gas law Isobaric processes Work done by a gas Gas laws
Question 7 NECO_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • essay

A vertical cylindrical piston of cross‑sectional area 0.020 m² contains 1.5 mol of an ideal gas at 300 K and a pressure of 1.0×10⁵ Pa. The piston is frictionless and initially in equilibrium with the surrounding atmospheric pressure of 1.0×10⁵ Pa. The gas is heated so that the volume of the gas increases by 0.015 m³ while the piston moves freely. After this expansion the piston is locked in its new position and the gas is heated further to a temperature of 500 K. Answer the following:

Question Parts

( a )
The piston moves freely during the heating that causes the volume increase. (i) Determine the final temperature of the gas after the volume has increased by 0.015 m³. (ii) Calculate the work done by the gas during this expansion.
( b )
After the piston is locked, the gas is heated further until its temperature reaches 500 K. Determine the new pressure of the gas.
( c )
Explain qualitatively how the pressure reading on a manometer would change if the whole experiment were carried out at a high altitude where the atmospheric pressure is 0.8×10⁵ Pa, assuming the piston is initially balanced with the local atmospheric pressure.

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About This Question

This is Neco Model Questions Vol1 2019 Physics Question 7. It is one of the essay questions from the 2019 Neco Model Questions Vol1 Physics examination.

The question covers Pressure, Ideal gas law, Isobaric processes, Work done by a gas, Gas laws .

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