Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true?

A) A physical change has occurred, with energy is being absorbed.

B) A chemical change has occurred, with energy being given off.

C) A physical change has occurred, with energy being given off.

D) A chemical change has occurred, with energy being absorbed.

Question

Chemistry

Saige Mack

Today, 17:23

Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true?

A) A physical change has occurred, with energy is being absorbed.

B) A chemical change has occurred, with energy being given off.

C) A physical change has occurred, with energy being given off.

D) A chemical change has occurred, with energy being absorbed.

+2

Answers (1)

Know the Answer?

Ulises Drake · Answer 1

The correct option is D.

The reaction above is called dissociation of water, that is, water is broken down into oxygen and hydrogen through the passage of electric current. This is an example of a chemical reaction. The reaction is an endothermic reaction because energy is absorbed.