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What happens to the viscosity of a liquid as temperature increases?

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Question: What happens to the viscosity of a liquid as temperature increases?

Options:

  1. Increases
  2. Decreases
  3. Remains constant
  4. Varies unpredictably

Correct Answer: Decreases

Solution: 

As temperature increases, the viscosity of a liquid generally decreases because the increased thermal energy allows the molecules to move more freely.

What happens to the viscosity of a liquid as temperature increases?

Practice Questions

Q1
What happens to the viscosity of a liquid as temperature increases?
  1. Increases
  2. Decreases
  3. Remains constant
  4. Varies unpredictably

Questions & Step-by-Step Solutions

What happens to the viscosity of a liquid as temperature increases?
  • Step 1: Understand what viscosity means. Viscosity is a measure of how thick or sticky a liquid is.
  • Step 2: Know that temperature is a measure of how hot or cold something is.
  • Step 3: Realize that when you heat a liquid, its molecules gain energy and move faster.
  • Step 4: As the molecules move faster, they can slide past each other more easily.
  • Step 5: Because the molecules can move more freely, the liquid becomes less thick or sticky.
  • Step 6: Therefore, as the temperature increases, the viscosity of the liquid decreases.
  • Viscosity and Temperature Relationship – As temperature increases, the kinetic energy of the molecules in a liquid increases, leading to a decrease in viscosity.
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