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How does an increase in temperature affect the rate of diffusion?
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1. Intro to General Chemistry
Temperature
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In which situation do water molecules move faster: in a hot cup of coffee or in a cold cup of coffee?
A
In a hot cup of coffee
B
In a cold cup of coffee
C
Molecules move at the same speed in both
D
Molecules do not move in either
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Understand that the speed of water molecules is related to their kinetic energy, which depends on temperature.
Recall that temperature is a measure of the average kinetic energy of molecules in a substance.
Recognize that in a hot cup of coffee, the temperature is higher, so the water molecules have more kinetic energy and move faster.
In contrast, in a cold cup of coffee, the temperature is lower, so the water molecules have less kinetic energy and move slower.
Therefore, water molecules move faster in a hot cup of coffee compared to a cold cup of coffee.
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