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NEET2002ChemistryThermodynamics (C)Actual

Assertion : Absolute values of internal energy of substances can not be determined. Reason : It is impossible to determine exact values of constituent energies of the substances.

Options

  1. AIf both the assertion and reason are true and reason is a correct explanation of the assertion.
  2. BIf both assertion and reason are true but assertion is not a correct explanation of the assertion.
  3. CIf the assertion is true but the reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both the assertion and reason are true and reason is a correct explanation of the assertion.

Step-by-step solution

Internal energy is given by : E=E_ translational +E_ rotaional +E_ vibrational +E_ bonding +E_ electronic Accurate measurement of some forms of energy which contribute to the absolute value of internal energy for a given substance in a given state is impossible. So difference of the initial state and final state is calculated and is denoted by E=E_f-E_i

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