Question

В форму для приготовления льда налили воду при температуре 0 градусов и поставили в морозилку . как при этом изменилась внутренняя энергия вещества , его масса и плотность ?

Answer 1

внутренняя энергия уменьшилась ( так ка t  понизилась)

масса не изменилась

плотность уменьшилась ( потому что объем льда увеличился по сравнению с объемом воды)

Answer 2

Changes in Internal Energy, Mass, and Density of the Substance

When water at a temperature of 0 degrees Celsius is placed in a freezer, several changes occur in its properties, including its internal energy, mass, and density.

Internal Energy: The internal energy of the water decreases as it loses heat and freezes. This is because the water molecules lose kinetic energy as they transition from a liquid state to a solid state. The decrease in internal energy is a result of the removal of heat from the water as it freezes.

Mass: The mass of the water remains constant throughout the process. Freezing does not change the mass of the substance, as the number of water molecules remains the same before and after freezing.

Density: The density of water increases as it freezes. When water freezes, its molecules form a crystalline structure, which causes the volume occupied by the same mass of water to decrease. As a result, the density of ice is lower than that of liquid water, which is why ice floats on water.

In summary, when water at 0 degrees Celsius is placed in a freezer, its internal energy decreases, its mass remains constant, and its density increases as it transitions from a liquid to a solid state.