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BITSAT2020ChemistryThermodynamics (C)Actual

For the combustion reaction at 298 ~K 2 Ag ( s )+1 / 2 O ₂( ~g ) 2 Ag ₂ O ( s ) Which of the following alternatives is correct?

Options

  1. AH = U
  2. BH > U
  3. CH < U
  4. DH and U has no relation with each other

Correct answer

C. H < U

Step-by-step solution

H = U + nRT n = n _ p - n _ R Now, n =2- 5 2 =- 1 2 H = U - 1 2 RT Thus, U = H + 1 2 RT U > H

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