WBJEE · Physics · Thermodynamics
In the given figure, 1 represents isobaric, 2 represents isothermal and 3 represents adiabatic processes of an ideal gas. If \(\Delta \mathrm{U}_{1}, \Delta \mathrm{U}_{2}, \Delta \mathrm{U}_{3}\) be the changes in internal energy in these processes respectively, then
- A \(\Delta \mathrm{U}_{1} < \Delta \mathrm{U}_{2} < \Delta \mathrm{U}_{3}\)
- B \(\Delta \mathrm{U}_{1}>\Delta \mathrm{U}_{3} < \Delta \mathrm{U}_{2}\)
- C \(\Delta \mathrm{U}_{1}=\Delta \mathrm{U}_{2}>\Delta \mathrm{U}_{3}\)
- D \(\Delta \mathrm{U}_{1}>\Delta \mathrm{U}_{2}>\Delta \mathrm{U}_{3}\)
Answer & Solution
Correct Answer
(D) \(\Delta \mathrm{U}_{1}>\Delta \mathrm{U}_{2}>\Delta \mathrm{U}_{3}\)
Step-by-step Solution
Detailed explanation
\(\Delta \mathrm{T}_{1}=\mathrm{T}_{0}\) \(\Delta \mathrm{T}_{2}=0\) \(\Delta \mathrm{T}_{3}=-\mathrm{ve}\) \(\Rightarrow \Delta \mathrm{U}_{1}>\Delta \mathrm{U}_{2}>\Delta \mathrm{U}_{3}\)
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