Question

When a strip of zinc metal is added to a test tube of hydrochloric acid, the liquid forms bubbles, and the test tube feels hot. The bubbles are a result of the formation of hydrogen gas. What does the hot test tube indicate? A. The reaction releases heat. B. Hydrogen gas absorbs heat. C. The reaction absorbs heat. D. A chemical change has been reversed.

Answer 1

Answer:

A

Explanation:

When a strip of zinc metal is added to a test tube of hydrochloric acid, the liquid forms bubbles, and the test tube feels hot. The bubbles are a result of the formation of hydrogen gas.

Then the reaction releases heat.

Answer 2

Since the test tube feels hot to touch, the reaction between zinc metal and hydrochloric acid is snap exothermic reaction.

What are exothermic reactions?

Exothermic reactions are reactions which occur with the liberation of heat to the surroundings.

Exothermic reaction vessels feel hot to touch because heat is given out.

When a strip of zinc metal is added to a test tube of hydrochloric acid, the liquid forms bubbles, and the test tube feels hot.

Therefore, it can be concluded that the reaction between zinc metal and hydrochloric acid is snap exothermic reaction.

Learn more about exothermic reactions at: https://brainly.com/question/2924714