KCET · Chemistry · Thermodynamics (C)
Given below are two statements.
Statement-I : Adiabatic work done is positive when work is done on the system and internal energy of the system increases.
Statement - II : No work is done during free expansion of an ideal gas.
In the light of the above statements, choose the correct answer from the options given below.
- A Both statements - I and Statement - II are false
- B Statement - I is true but statement - II is false
- C Statement - I is false but statement - II is true
- D Both statements - I and Statement - II are true.
Answer & Solution
Correct Answer
(D) Both statements - I and Statement - II are true.
Step-by-step Solution
Detailed explanation
S-I : In adiabatic process \(\Delta \mathrm{U}=\mathrm{W}\) and work done on the system is positive there fore internal energy increses.
S-II : When external pressure is zero, work done is zero
S-II : When external pressure is zero, work done is zero
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