Question

18. Classify the following reactions,
(a) Zn(s) + H SO, (aq) -> ZnSO, (aq) + H2(g)
(b) BaCl, (aq) + Na,so, (aq) - BaSO (s) + 2NaCl (aq)
(c) 2CO(g) + O2(g) - 200, (g)
(d) 2KNO3(s) - 2KNO, (I) + 0, (g)
(e) 3Fe(s) + 4H,0 (steam) Fe,0(s) + 4H2(g)

TELL ME WHICH REACTIONS ARE THESE NO SPAMMING​

Answer 1

Answer:

(a) Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2↑ (g)

TYPE: Displacement; exothermic.

(b) BaCl2 (aq) + Na2SO4 (aq) → BaSO4↓ (s) + 2NaCl (aq)

TYPE: Metathesis reaction (d. displacement), precipitation reaction, endothermic.

(c) 2CO (g) + O2 (g) → 2CO2 (g)

TYPE: Combination reaction, exothermic.

(d) 2KNO3 (s) → 2KNO2 (l) + O2↑ (g)

TYPE: Decomposition reaction, endothermic.

(e) 3Fe + 4H20 → Fe2O4 (s) + 4H2↑ (g)

TYPE: Oxidation reaction.

More: In endothermic reactions, ∆H = +ve whereas in exothermic, ∆H = -ve.