Question

In adjoining P - V diagram, $100J$ of heat is given in taking a system from A to C along the path ADC and $50J$ of work is done by the system in this path. How much heat will be absorbed or given out if the work done on the system alone the cured path from C to A is $15J$?

A) $-{\text{ }}65{\text{ }}J$.
B) $-{\text{ 7}}5{\text{ }}J$
C) $-{\text{ 9}}5{\text{ }}J$
D) $-{\text{ 11}}5{\text{ }}J$

Answer 1

A curve showing variation of volume of substance taken along the X axis and the variation of pressure taken along Y axis is called an indicator diagram.

Complete Step by step answer:
In the adjoining pressure and volume graph of an ideal gas is shown.
-The p-v diagram shows the feature of an idealized.
-The path between each state taking some process from A to D.
-The P –V diagram is taking the ABCD Path.
-From A to C along the path ADC, $100J$ of heat is given in taking a system.
-In this path $50J$ of work is done by the system.
-The work done on the system along the curved path from C to A is $15J$
Therefore, the heat will be absorbed or given out value is $- 65J$.

So, the correct answer is option (A).

Additional information:
-P-V diagram: On the left we have plotted the pressure versus the volume, which is called a p-V diagram.
-In a p-V diagram, from the upper left to the lower right, we say that the lines have a constant temperature curve.
-On this process were performed at the constant temperature is known as isothermal process.

Note: The p-v diagram is originally called indicator diagram.
-The pressure and volume diagram is used to describe corresponding changes in a system.
-The pressure and volume diagram is used to estimate the net work performed by a thermodynamic cycle.
-The total area under the curve on a PV diagram, is we can find the work done by determining.