Question

Під час якого процесу внутрішня енергія газу не змінюється?

Answer 1

Во время какого процесса внутренняя энергия газа не меняется?

Ответ: если U=const, то ΔU=0, такое возможно, если ΔТ=0 или Т=const,
так как ΔU ~ ΔT( изменение внутренней энергии прямо пропорционально изменению температуры).
При Т=const процесс изотермический. 

Answer 2

The Process of Constant Internal Energy in a Gas

The internal energy of a gas refers to the total energy possessed by the gas particles, including their kinetic energy and potential energy. In most processes involving gases, the internal energy of the gas changes. However, there is one specific process in which the internal energy of a gas remains constant. This process is known as an isochoric process, also called a constant volume process.

In an isochoric process, the volume of the gas remains constant while other properties, such as pressure and temperature, may change. Since the volume does not change, no work is done by or on the gas. As a result, the change in internal energy is solely due to heat transfer.

During an isochoric process, the internal energy of the gas does not change because there is no work done on or by the gas. The heat added to or removed from the gas solely contributes to changing the temperature of the gas. This can be expressed mathematically as:

ΔU = Q

Where: - ΔU represents the change in internal energy of the gas - Q represents the heat added to or removed from the gas

In an isochoric process, the change in internal energy is equal to the heat transfer. Since the internal energy remains constant, the change in internal energy (ΔU) is zero, indicating that there is no net heat transfer during the process.

To summarize, the internal energy of a gas does not change during an isochoric process, where the volume remains constant and no work is done on or by the gas. The change in internal energy is solely due to heat transfer, and the equation ΔU = Q represents this relationship.