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KCET2008ChemistryThermodynamics (C)

If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then

Options

  1. AH > U
  2. BH = U
  3. CH < U
  4. Dthere is no relationship

Correct answer

C. H < U

Step-by-step solution

aligned & H = U + n _ g RT & n _ g = Number of moles of product & - number of moles of reactant &=1-2=-1 & H = U - RT & H < U aligned

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