25.13 CHAPTER 25. EXERCISE SOLUTIONS
Physical and chemical
change
ESAIW
End of chapter exercises ESAIX
(1) (a)physical change
(b)chemical change
(c) synthesis reaction
(2)see definitions
(3) (a)physical change(b)chemical change
(c)chemical change
(d)chemical change
(e)physical change
(f)physical change(g)physical change
(h)chemical change
(4) (a)decomposition
(b)synthesis
(c)decompositionRepresenting chemical
change
ESAIY
End of chapter exercises ESAIZ
(1)C 3 H 8 (ℓ) + 5O 2 (g)→ 3 CO 2 (g)+H 2 O(ℓ)
(2)CH 4 + 2O 2 →CO 2 + 2H 2 O
(3) (a)P 4 (s)+ 5O 2 (g)→ 2 P 2 O 5 (s)
(b)same number of atoms on both sides
(c) phosphorus oxide
(d)synthesis
(4) 2 C 2 H 6 (g) + 7O 2 (g) → 4 CO 2 (g)+6 H 2 O(ℓ)
(5) 2 N 2 O 5 → 4 NO 2 +O 2
(6) 2 H 2 S+ 3O 2 → 2 SO 2 + 2H 2 O 2 H 2 S+
SO 2 → 3 S+ 2H 2 O
(7)C 14 H 18 N 2 O 5 (s)+16O 2 (g)→ 9 H 2 O(ℓ)+
14 CO 2 (g)+N 2 (g)Magnetism ESAJA
End of chapter exercises ESAJB
490 Chemistry: Chemical systems