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Hot syrup flows more easily (faster) than cold syrup because:
- surface tension increases with temperature.
- viscosity decreases with temperature.
- viscosity increases with temperature.
- surface tension decreases with temperature.
Correct answer: viscosity decreases with temperature.
Solution
For liquids, viscosity decreases as temperature increases because the molecules gain kinetic energy and intermolecular cohesive forces weaken. Lower viscosity means less internal resistance to flow, so hot syrup flows faster.
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