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

5. Kg NH3 g NH3 mol NH3 kJTo get to kj just multiply by (-906 kJ/mol)

6.

7.

8. Use ∆Hr°xn = Σnp ∆Hf° (products) - Σnr∆Hf° (reactants)

Ch 4

9.

10.

11. Soluble according to solubility rules12.

13.

the CHO2 in the product has a – charge

14.

15.

Ch 3

16. A) BH3; B) CCl4

17.

18. a) CaCl2; b) Sulfur dioxide; c) Cobalt (II) fluoride; d) Perchloric acid

19.

20.

Ch 2

Ch 1