Question

In figure a certain mass of gas traces three path 1,2,3 from state A to the state B.If work done by the gas along the three paths are $W_1,W_2,W_3$ respectively,then:

• A. $W_1$
• B. $W_1=W_2=W_3$
• C. $W_1>W_2>W_3$
• D. Cannot say

Answer 1

The correct option is C $W_1>W_2>W_3$

Work done by a gas is define as Work=change in (Pressure*volume)

or by graph we can define it as Work = area under the curve of pressure and volume graph.

In figure a certain mass of gas traces three path 1,2,3 from state A to the state B.If work done by the gas along the three paths are W1,W2,W3 respectively.

Since the work done by gas = area under the curve of pressure and volume graph. and the area under the graph is more in $1>2>3$

Hence the work done is also in order $W_1>W_2>W_3$