Question

What can you conclude about these two reactions based on the chemical equations?

Reaction A: 6CO2(g) + 6H2O(l) + sunlight → C6H12O6(aq) + 6O2(g)
Reaction B: 2H2(g) + O2(g) → 2H2O(g) + energy








A.

Reactions A and B are both exothermic.

B.

Reaction A is endothermic, and reaction B is exothermic.

C.

Reactions A and B are both endothermic.

D.

Reaction A is exothermic, and reaction B is endothermic

Answer 1

Answer: B. Reaction A is endothermic, and reaction B is exothermic

Step-by-step explanation:

6CO2+6H2O+ sunlight, so it absorbs thermal energy from the outside

2H2(g) + O2= 2H2O+ energy : it releases energy, so exothermic

Answer 2

reaction A : 6 CO2 (g) +6 H2O(l) +sunlight→ C6H12O6(aq) +6O2(g)

reaction B: 2H2(g) +O2(g)→ 2H2O (g) + energy

What we can conclude about the above chemical reaction is that

reaction A is endothermic, and reaction B is exothermic (answer B)

Explanation

Endothermic reaction is a reaction that absorb energy from its surrounding.

Exothermic reaction is a reaction that releases energy to the surrounding.

Reaction A : is endothermic since it absorb energy in form of sunlight from its surrounding.

Reaction B is a exothermic reaction since it releases energy to the surrounding.