QQuestionChemistry
QuestionChemistry
Why is vaporization endothermic?
Why is condensation exothermic?
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Answer
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Step 1:I'll solve this problem by explaining the energy changes during phase transitions with a focus on vaporization and condensation.
Step 2:: Understanding Phase Transitions
Phase transitions involve changes in the energy state of molecules as they move between different states of matter. In the case of vaporization and condensation, we're focusing on the transition between liquid and gas states.
Step 3:: Vaporization (Liquid to Gas) - Endothermic Process
Vaporization is endothermic because: - Molecules in a liquid state are closely packed and have intermolecular attractions - To transform into a gas, molecules must overcome these attractive forces - Energy (heat) is required to break the intermolecular bonds - This energy input allows molecules to:
Final Answer
- Vaporization is endothermic because energy is absorbed to break intermolecular bonds - Condensation is exothermic because energy is released when intermolecular bonds reform
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