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Questions and Answers
Which of the following statements is true about endothermic reactions?
Which of the following statements is true about endothermic reactions?
- They take more energy to break bonds in the reactants than is released when new bonds form in the products (correct)
- They do not involve any energy changes
- They release more energy than is needed to break bonds in the reactants
- They involve energy being released when new bonds form in products
What is the main reason behind the instant ice pack getting cold when squeezed?
What is the main reason behind the instant ice pack getting cold when squeezed?
- Endothermic chemical reaction (correct)
- Melting of ice inside the pack
- Exothermic chemical reaction
- Freezing of water inside the pack
What is the role of energy in chemical reactions?
What is the role of energy in chemical reactions?
- Energy is used to break bonds in products
- Energy is used to break bonds in reactants and released when new bonds form in products (correct)
- Energy is not involved in chemical reactions
- Energy is released when new bonds form in reactants
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