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NEETChemistryThermodynamics (C)

What is the enthalpy of solution (∆solH) for the dissolution of NaCl(s) in water, given that ∆latticeH = +788 kJ mol–1 and ∆hydH = –784 kJ mol–1?

Options

  1. A+4 kJ mol–1
  2. B+784 kJ mol–1
  3. C–4 kJ mol–1
  4. D+788 kJ mol–1

Correct answer

A. +4 kJ mol–1

Step-by-step solution

The enthalpy of solution for the dissolution of NaCl(s) is +4 kJ mol–1, calculated by subtracting the value of ∆ hyd H from ∆ lattice H.

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