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Subject - Chemistry:

Basics

MCQ - 63-2249

Question:

For which one of the following equations does the enthalpy change represent the lattice energy of sodium chloride?

  1. Na(s) + ½ Cl2(g) → NaCl(s)
  2. Na+ (aq) + Cl-(aq) → NaCl(aq)
  3. Na(g) + Cl(g) → NaCl(s)
  4. Na+ (aq) + Cl-(aq) → NaCl(aq)
  5. Na+(g) + Cl-(g) → NaCl(s)

Correct Answer: E

Explanation:

lattice energy is the energy given out when gaseous ions combine to form 1 mole of solid ionic crystal lattice.

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