Question

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?


a) It is an endothermic reaction

b) It is an exothermic reaction

c) It is a decomposition reaction
plz answer quick

Answer 1

Answer:

c) It is a decomposition reaction

plz answer quick

I think this is your answer mark me as brainlist plz

Answer 2

ANSWER BELOW

(A) This is an incomplete combustion reaction so energy will be released.

(B)Combination of nitrogen and oxygen to form Nitrogen Monoxide-

Heat is required for this process.

So N2+O2→2NO−180.6KJ is an endothermic reaction.

(C) combination of glucose and oxygen to form carbon dioxide and water is a combustion reaction.So energy will be released.

(D)in a combination of zinc and hydrochloric acid to form zinc chloride and hydrogen heat is released.

so correct answer is  (B).