NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Thermodynamics
NEET · Physics · Thermodynamics
Pressure (P) versus density (d) graph of an ideal gas is shown in...
Pressure versus density (d) graph of an ideal gas is shown in the figure. Choose the correct statement.
Options
- ADuring the process , workdone by the gas is positive
- BDuring the process , workdone by the gas is negative
- CDuring the process , internal energy of the gas increases
- DDuring the process DA, internal energy of the gas remains constant
Correct answer
D. During the process DA, internal energy of the gas remains constant
Step-by-step solution
- Graph is P vs density (d).
- From ideal gas law: (P=\frac{\rho R T}{M}).
At constant temperature (T), (P \propto \rho \Rightarrow) straight line through origin.
- Line DA is parallel to (P \propto d), hence isothermal process.
- In an isothermal process, temperature remains constant, so internal energy constant.
Thus, the correct statement is (4).