JEE Mains · Physics · STD 11 - 11. thermodynamics
A gas is compressed adiabatically, which one of the following statement is NOT true.
- A There is no heat supplied to the system
- B The temperature of the gas increases
- C The change in the internal energy is equal to the work done on the gas.
- D There is no change in the internal energy
Answer & Solution
Correct Answer
(D) There is no change in the internal energy
Step-by-step Solution
Detailed explanation
(1) \(\Delta Q=0\) (2) \(\Delta Q =\Delta U +\Delta W\) \(\Rightarrow \Delta U =-\Delta W\) adiabatic compression \(( V \downarrow)\) \(\Delta W =- ve \Rightarrow \Delta U =+ ve\) \(\Delta U \uparrow \Rightarrow T \uparrow\) \(\Delta U \neq 0\)
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