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MHT CET20239 May 2023Evening ShiftChemistryThermodynamics (C)Actual

For NaCl _ ( s ) enthalpy of solution is 4 ~kJ ~mol ⁻¹ and lattice enthalpy is 790 ~kJ ~mol ⁻¹ . What is hydration enthalpy of NaCl ?

Options

  1. A786 ~kJ
  2. B794 ~kJ
  3. C-786 ~kJ
  4. D-794 ~kJ

Correct answer

C. -786 ~kJ

Step-by-step solution

aligned _ soln H & = _ L H + _ hyd H _ hyd H & = _ soln H - _ L H & =4 ~kJ ~mol ⁻¹-790 ~kJ ~mol ⁻¹ & =-786 ~kJ ~mol ⁻¹ aligned

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