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Questions and Answers
Which of the following is a characteristic of a chemical change?
Which of the following is a characteristic of a chemical change?
- No change in energy occurs
- No change in mass occurs
- New substances are produced (correct)
- The alteration is temporary
Why is rusting of iron considered a chemical change?
Why is rusting of iron considered a chemical change?
- The alteration is temporary
- The mass of the object decreases
- New substance, iron oxide, is created (correct)
- No change in energy occurs
What is an exothermic reaction characterized by?
What is an exothermic reaction characterized by?
- No change in energy
- Production of light energy
- Release of heat energy (correct)
- Absorption of heat energy
What characterizes an endothermic reaction?
What characterizes an endothermic reaction?
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What is recorded along with the products in an exothermic reaction?
What is recorded along with the products in an exothermic reaction?
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