Verified Solution • 2025–26 Session moderate

QJEEM20Chadca: JEE Main 2020 Chemistry - Class 11 JEEM20Chadca Solution: Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ…

Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol–1, and 4 kJ mol–1, respectively.
The hydration enthalpy of NaCl is :

Multiple Choice Options

  • A –780 kJ mol–1
  • B –784 kJ mol–1
  • C 780 kJ mol–1
  • D 784 kJ mol–1

Step-by-Step Verified Solution

Δ\Delta Hsol = Lattice enthalpy + Δ\Delta Hhyd

⇒\Rightarrow 4 = 788 + Δ\Delta Hhyd

⇒\Rightarrow Δ\Delta Hhyd = –784 kJ mol–1

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