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NEET2013ChemistryThermodynamics (C)Actual

Which thermodynamic parameter is not a state function?

Options

  1. Aq at constant pressure
  2. Bq at constant volume
  3. CW at adiabatic
  4. DW at isothermal

Correct answer

D. W at isothermal

Step-by-step solution

H and U are state functions but W and q are not state functions. From the equation, H= U+ P V At constant pressure, H= U+P V At constant volume, H= U+V P At constant pressure, P=0, H=q_p so, it is a state function. At constant volume, V=0, U=q_v so, it is a state function. Work done in any adiabatic process is state function. U=q-W ( q=0) U=-W Work done in isothermal process is not a state function. W=-q ( T=0, q 0)

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