Endothermic and Exothermic Processes
Explore the concepts of endothermic and exothermic reactions, including energy changes and real-world examples.
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Endothermic and Exothermic Processes
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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 best describes an exothermic process?
A process that absorbs heat from its surroundings.
A process that releases heat to its surroundings.
A process where the temperature of the system decreases.
A process that converts heat into work.
2. In an endothermic reaction, the enthalpy change (ΔH) is:
Negative
Positive
Zero
Dependent on the specific reaction
1. Burning wood is an example of an endothermic process.
True
False
2. When ice melts, it is an endothermic process.
True
False
1. In an exothermic reaction, energy is to the surroundings, causing the temperature of the surroundings to .
2. An endothermic reaction feels to the touch because it heat from your hand.
3. Photosynthesis is an example of an process because it requires energy from .
1. Explain the difference between endothermic and exothermic processes in terms of energy flow and temperature changes. Provide one real-world example for each.
2. Describe how a chemical cold pack works. Is it an endothermic or exothermic process? Justify your answer.
Match the process with its correct description.
1. Combustion
a. Endothermic, absorbs heat
2. Evaporation
b. Exothermic, releases heat
3. Melting
c. Endothermic, feels cool