What happens when the thermometer is placed in contact with any object?

What happens when the thermometer is placed in contact with any object?

When a thermometer is placed in contact with an object and reaches thermal equilibrium, we have a quantitative measure for the temperature of the object. For instance, when a thermometer is placed under the arm of an infant, heat is transferred until thermal equilibrium is reached.

Why does the liquid in the thermometer expand and contract when temperature changes?

When a liquid is hot the molecules move around faster and bump into each other and the walls of the container more often and harder than slower moving molecules do. One result of this is that a hot liquid will expand in direct proportion to its temperature.

What happens to a liquid in a thermometer when it gains kinetic energy?

Each collision between an air molecule and the wall of the thermometer results in a transfer of thermal energy from the air to molecules in the thermometer. This causes the molecules in the liquid to gain kinetic energy and move farther apart, expanding the liquid.

What will happen to the temperature on the thermometer when placed in a boiling water?

Heat. What happens when a thermometer bulb is placed in hot water? In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object because mercury expands when the temperature is increased and hence it rises in the capillary tube.

What do you call the liquid inside the thermometer?

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. Mercury thermometers can be used to determine body, liquid, and vapor temperature. Mercury thermometers are used in households, laboratory experiments, and industrial applications.

What happens to the liquid in a thermometer?

When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. This results in movement up the thermometer. When cooled, the molecules of the liquid in the thermometer move slower, causing them to get a little closer together.

What causes the liquid in a thermometer to rise?

When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. This results in movement up the thermometer.

What happens when a thermometer is placed in hot water?

Item AM042005: When a glass thermometer is placed in hot water, the level of liquid rises because the molecules get farther apart. A glass thermometer has a colored liquid inside it. The level of colored liquid rises when the thermometer is placed in hot water.

Why do molecules move up in a thermometer?

In the thin tube, the molecules can’t move very far sideways, so they go up. This causes a greater difference in the height of the liquid, which is easier to see. Have students draw a molecular model to represent the molecules of the the liquid in a thermometer.

How do you identify the liquid in a thermometer?

You can identify the liquid in a thermometer based on its color. Silver liquid indicates that the thermometer contains mercury, while red liquid is alcohol to which red coloring has been added. Although uncommon in modern thermometers, a clear color indicates water. The liquid in a thermometer typically stays in a bulb at the bottom of the device.

What is the difference between silver and red liquid in thermometers?

Silver liquid indicates that the thermometer contains mercury, while red liquid is alcohol to which red coloring has been added. Although uncommon in modern thermometers, a clear color indicates water.