a thermometer is placed in water in order to measure the waters temperature. what would cause the liquid in…
a thermometer is placed in water in order to measure the waters temperature. what would cause the liquid in the thermometer to rise?\no the molecules in the water move closer together.\no the molecules in the thermometers liquid spread apart.\no the kinetic energy of the water molecules decreases.\no the kinetic energy of the thermometers liquid molecules decreases.
Answer
Brief Explanations:
When the thermometer is placed in water, heat transfer occurs. If the water is at a higher temperature, the liquid in the thermometer (usually mercury or alcohol) absorbs heat. According to the principle of thermal expansion, when the liquid in the thermometer absorbs heat, its molecules gain kinetic energy and move more vigorously. This causes the molecules in the thermometer's liquid to spread apart (thermal expansion), resulting in the rise of the liquid column in the thermometer.
- For the option "The molecules in the water move closer together": This is related to the state change or compression of water, not directly related to the rise of the liquid in the thermometer.
- For the option "The kinetic energy of the water molecules decreases": If the kinetic energy of water molecules decreases, it means the water temperature is decreasing, which would cause the liquid in the thermometer to contract (molecules get closer), not rise.
- For the option "The kinetic energy of the thermometer’s liquid molecules decreases": Decreasing kinetic energy of the thermometer's liquid molecules would lead to contraction (molecules get closer), not a rise.
Answer:
The molecules in the thermometer’s liquid spread apart.