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Study Union Answer KeyCh 6
1. change in energy = work + heat. Work and heat both negative because work is performed and heat is produced. Answer = (-1500) + (-900) = -2400
2.
3.
4. A) exothermic; -∆H B)Exothermic; -∆H
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5. Kg NH3 g NH3 mol NH3 kJTo get to kj just multiply by (-906 kJ/mol)
6.
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7.
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8. Use ∆Hr°xn = Σnp ∆Hf° (products) - Σnr∆Hf° (reactants)
Ch 4
9.
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10.
11. Soluble according to solubility rules12.
13.
the CHO2 in the product has a – charge
14.
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15.
Ch 3
16. A) BH3; B) CCl4
17.
18. a) CaCl2; b) Sulfur dioxide; c) Cobalt (II) fluoride; d) Perchloric acid
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19.
20.
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Ch 2
Ch 1
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