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29 August, 21:12

When 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.

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  1. 29 August, 21:41
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    I believe the correct answer is option D. When an electric current passes through liquid water, a chemical change has occurred, with energy being absorbed. This process is called electrolysis of water. It is a chemical decomposition of water using electricity as the energy source. Any chemical reaction involves a chemical change.
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