Chemistry, 17.10.2020 08:01 ronaldotheexplorer12

Select all the correct answers. Some chemical reactions absorb energy rather than release it. Which of these phenomena are caused by chemical reactions
that absorb energy? If you're not sure, make a guess.
1. Plants use sunlight and atmospheric gases to make food.

2. A person activates a cold pack by hitting it against a surface.

3. A rechargeable battery is plugged in to charge.

4. Heat is used to separate a compound into its elements.

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