Sage-Tips

How does temperature affect the liquid?

In general, liquids tend to get “thinner” when their temperature increases. In general, the liquids tend to expand when their temperature increases. For example, the same mass of boiling water occupies more volume at 100 degrees Celsius than at 20 degrees Celsius. Therefore, increasing temperature decreases density.

What happens to the temperature of a liquid as it freezes?

Freezing. When a liquid is cooled, the average energy of the molecules decreases. The temperature of a freezing liquid remains constant, even when more heat is removed. The freezing point of a liquid or the melting point of a solid is the temperature at which the solid and liquid phases are in equilibrium.

Why does temperature decrease with lower pressure?

For example, when the pressure increases then the temperature also increases. When the pressure decreases, then the temperature decreases. Because there is less mass in the can with a constant volume, the pressure will decrease. This pressure decrease in the can results in a temperature decrease.

How does temperature affect liquid viscosity?

The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature. Thus, upon heating, liquids flow more easily, whereas gases flow more sluggishly.

Why does liquid in a thermometer rise with hot water?

The way a thermometer works is an example of heating and cooling a liquid. 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 liquid freezes?

Freezing occurs when a liquid is cooled and turns to a solid. Eventually the particles in a liquid stop moving about and settle into a stable arrangement, forming a solid. This is called freezing and occurs at the same temperature as melting.

Why do liquids expand when frozen?

Upon freezing, the molecules set themselves in an arrangement that is very open in nature and contains more space than the water in the liquid state. Hence, water is said to expand on freezing and becomes less dense.

What happens to the pressure when the temperature decreases?

Gay Lussac’s Law – states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. Conversely if you cool the molecules down they will slow and the pressure will be decreased.

How does temperature affect pressure of liquid?

An increase in temperature will tend to decrease the density of any fluid. As the fluid temperature increases, it tries to expand, but expansion is prevented by the walls of the container. Because the fluid is incompressible, this results in a tremendous increase in pressure for a relatively minor temperature change.

Why does liquid viscosity decreases with rising temperature?

Increasing temperature results in a decrease in viscosity because a larger temperature means particles have greater thermal energy and are more easily able to overcome the attractive forces binding them together.