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11.Thermodynamics
medium
An ideal gas of mass $m$ in a state $A$ goes to another state $B$ via three different processes as shown in figure. If $Q_{1}, Q_{2}$ and $Q_{3}$ denote the heat absorbed by the gas along the three paths, then
A
$Q_{1} < Q_{2} < Q_{3}$
B
$Q_{1} < Q_{2}=Q_{3}$
C
$Q_{1}=Q_{2} > Q_{3}$
D
$Q_{1} > Q_{2} > Q_{3}$
(AIIMS-2018)
Solution
Initial and final states are same in all the process.
Hence, $\Delta U=O$ is same for each case.
$\therefore \Delta Q=\Delta W$
Area enclosed by curve with volume.
$\because(\text { Area })_{1}<(\text { Area })_{2}<(\text { Area })_{3}$
$\therefore Q_{1} < Q_{2} < Q_{3}$
Standard 11
Physics
