Chemical Reactivity Worksheet
This worksheet covers fundamental concepts of chemical reactivity, including reaction types, factors affecting reaction rates, and energy changes in reactions, suitable for Grade 11 Chemistry students.
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Chemical Reactivity Worksheet
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which of the following factors generally increases the rate of a chemical reaction?
Decreasing temperature
Decreasing reactant concentration
Increasing surface area
Adding an inhibitor
2. An exothermic reaction is characterized by:
Absorption of heat from the surroundings
Release of heat to the surroundings
No change in temperature
Formation of a precipitate
3. A substance that speeds up a chemical reaction without being consumed in the process is called a .
4. The minimum amount of energy required to initiate a chemical reaction is known as the energy.
5. Increasing the pressure on a gaseous reaction will generally decrease the reaction rate.
True
False
6. A combustion reaction is always an endothermic reaction.
True
False
7. Explain how a catalyst affects the activation energy of a chemical reaction.
8. Describe the difference between an endothermic and an exothermic reaction in terms of energy flow.
Match each term on the left with its definition on the right.
9. Reactant
a. A substance formed as a result of a chemical reaction
10. Product
b. A substance that undergoes a chemical change
11. Activation Energy
c. The minimum energy required to start a chemical reaction