Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11

# A Cylinder Containing a Gas is Lifted from the First Floor to the Second Floor. What is the Amount of Work Done on the Gas? What is the Amount of Work Done by the Gas? - Physics

Short Note

A cylinder containing a gas is lifted from the first floor to the second floor. What is the amount of work done on the gas? What is the amount of work done by the gas? Is the internal energy of the gas increased? Is the temperature of the gas increased?

#### Solution

As a cylinder is lifted from the first floor to the second floor, there is decrease in the atmospheric pressure on the gas and it expands. Therefore, some work is done by the gas on its surroundings. Work done on the gas is zero.

Work done by the gas, W = PΔV (positive)

The increase in the internal energy and temperature of the system will depend on the types of the walls of the system (conducting or insulating).

Concept: Heat, Internal Energy and Work
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 4 Laws of Thermodynamics
Short Answers | Q 3 | Page 60