Вопрос
3.How does the surface tension depend on the temperature? Why?
Решения
4.6
(383 Голоса)
Юлия
элита · Репетитор 8 лет
Ответ
The surface tension of a liquid decreases as the temperature increases and increases as the temperature decreases. This is because the increased kinetic energy of the molecules at higher temperatures allows them to escape the surface more easily, reducing the cohesive forces that hold them at the surface. Conversely, at lower temperatures, the decreased kinetic energy of the molecules means they are less likely to escape the surface, leading to an increase in surface tension.
Объяснение
## Step 1Surface tension is a property of liquids that allows them to resist external forces. It is the result of the cohesive forces between the molecules at the surface of the liquid. These forces pull the molecules at the surface inward, creating a sort of "skin" on the surface of the liquid.## Step 2The surface tension of a liquid is dependent on the temperature. As the temperature increases, the kinetic energy of the molecules also increases. This means that the molecules at the surface of the liquid have more energy to escape the surface and enter the bulk of the liquid.## Step 3As the temperature increases, the surface tension of the liquid decreases. This is because the increased kinetic energy of the molecules at the surface allows them to escape more easily, reducing the cohesive forces that hold them at the surface.## Step 4Conversely, as the temperature decreases, the kinetic energy of the molecules decreases. This means that the molecules at the surface have less energy to escape the surface and enter the bulk of the liquid. As a result, the cohesive forces that hold them at the surface increase, leading to an increase in surface tension.