What happens to the mercury and the glass when heated?

When a mercury thermometer is heated, the mercury expands and rises in the thin tube of glass. This is because the glass would also expand and hence this expansion would stop the rising of the mercury level.

What happens to mercury in a thermometer when heated?

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

Why does a column of mercury in a thermometer first descends and rises?

When a mercury thermometer is placed in hot water, the bulb at first gets heat from outside and expands and hence, the column of mercury in the thermometer at first descends slightly. Later on, heat is passed to the mercury and it expands.

When mercury is kept in glass the?

Explain. Ans: Because cohesive force between molecules of mercury is greater than the adhesive force between mercury and glass molecules.

How mercury works in a thermometer?

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

When a fluid thermometer mercury or alcohol is placed in hot water the fluid level temporarily drops then quickly rises Why?

1. The liquid in the thermometer goes up when the thermometer is heated because heating makes the alcohol molecules of the liquid move faster. The extra speed of the molecules competes with their attraction for one another and causes them to move slightly further apart.

What will happen if a mercury thermometer is suddenly put in a hot water trough?

When an ordinary mercury thermometer is placed in hot water, its reading drops at first, but then quickly rises. So, the mercury will remain at the same volume while the volume of the glass container will expand resulting in what appears to be a drop in the temperature.

When the mercury expands the line of mercury goes up down?

The reason of rise level of Mercury is as mercy expand in contact with heat. When we put the mercy thermometer the bottom of the bulb in hot object the heat is transfer to the mercy and it expand and rise. most of the metal are solid in room temperature but mercury is the only metal which is liquid in room temperature.