In order to receive full credit, the meaning of any arithmetic calculation must be shown, otherwise...
In order to receive full credit, the meaning of any arithmetic calculation must be shown, otherwise a correct answer with a calculation, without supporting work scores only 30%.
Using the information below, calculate ∆Hf°for the following reaction: ErF3(s) + 6HCl (g) → ErCl3 (s) + 3HF (g)
2Er(s) + 6HF(g) → 2ErF3 (s) + 3H2 (g) ∆Hf°= -1795.4 kj/mol
2Er(s) + 6HCl(g) → 2ErCl2 (s) + 3H2 (g) ∆Hf°= -1443.6 kj/mol
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