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The combined form of first and second law of thermodynamics is given by (p = pressure, V = volume, T = temperature, U = internal energy, S = entropy, Q = quantity of heat)
Select one:
  • a)
    dU = TdQ + dQ
  • b)
    TdS = dU + pdV
  • c)
    TdS = dU – pdV
  • d)
    dQ = TdS + pdV
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The combined form of first and second law of thermodynamics is given b...
According to first law of thermodynamics 
dQ = dU + pdV ...(1)
According to second law of thermodynamics

Combined form of (1) and (2)
TdS = dU + pdV
The correct answer is: TdS = dU + pdV
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Most Upvoted Answer
The combined form of first and second law of thermodynamics is given b...
DQd)TdS = dU pdV
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