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Thermodynamics question

2002 · Q115
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Thermodynamics question

2002 · Q115

NEETChemistryThermodynamicsMCQ+4 / −1
In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true ?
  1. A
    Δ\DeltaΔE = W ≠\ne= 0, q = 0
  2. B
    Δ\DeltaΔE = w = q ≠\ne= 0
  3. C
    Δ\DeltaΔE = 0, W = q ≠\ne= 0
  4. D
    W = 0, Δ\DeltaΔE = q ≠\ne= 0.
View written solutionFree

Correct answer: A

When in a closed insulated container, a liquid is stirred, it increases the temperature of liquid thus it started behaving as adiabatic process resulting no change in heat and only temperature increases. Therefore, q = 0 for this process.

Also, Δ\Delta ΔE = q + W

Δ\Delta ΔE = W (As, q = 0)

As, there is rise in temperature thus, there must be change in internal energy, i.e., Δ\Delta ΔE = W ≠ 0.

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