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Whelan Whelan
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9 years ago
Calculate the energy change for the formation of CaF2(s) from its elements in their standard states and the following information:

   Ca(s) + F2(g) → CaF2(s)   ?
   Ca(s) → Ca(g)   +179.3 kJ/mol
   Ca(g) → Ca+(g) + e-   +589.9 kJ/mol
   Ca+(g) → Ca2+(g) + e-   +1145 kJ/mol
   1/2 F2(g) → F(g)   +79.0 kJ/mol
   F(g) + e- → F-(g)    -328.0 kJ/mol
   CaF2(s) → Ca2+(g) + 2 F-(g)   +2630 kJ/mol

A) +4046 kJ/mol
B) -965 kJ/mol
C) -1214 kJ/mol
D) -3286 kJ/mol
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Introductory Chemistry Essentials

Introductory Chemistry Essentials


Edition: 5th
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hbutler2hbutler2
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