NEET-XII-Physics
26: Laws of Thermodynamics
- #4Refer to figure. Let â–µU1 and â–µU2 be the changes in internal energy of the system in the process A and B. Then
(a) â–µU1 > â–µU2
(b) â–µU1 = â–µU2
(c) â–µU1 < â–µU2
(d) ▵U1 ≠▵U2.digAnsr: bAns : (b) ∆U1 = ∆U2
​The internal energy of the system is a state function, i.e. it only depends on the initial and final point of the process and doesn't depend on the path followed. Both processes A and B have common initial and final points. Therefore, change in internal energy in process A is equal to the change in internal energy in process​ B. Thus,
∆U1 = ∆U2 = 0
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