Problem: The lattice energy of calcium bromide is the energy change for the reaction 1. CaBr2(s) → Ca(g) + 2 Br(g) 2. Ca(s) + Br2(ℓ) → CaBr 2(s) 3. Ca(g) + 2 Br(g) → CaBr 2(g) 4. CaBr2(s) → Ca2+(g) + 2 Br−(g) 5. CaBr2(s) → Ca(g) + Br 2(g)

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The lattice energy of calcium bromide is the energy change for the reaction

1. CaBr2(s) → Ca(g) + 2 Br(g)

2. Ca(s) + Br2(ℓ) → CaBr 2(s)

3. Ca(g) + 2 Br(g) → CaBr 2(g)

4. CaBr2(s) → Ca2+(g) + 2 Br(g)

5. CaBr2(s) → Ca(g) + Br 2(g)