Question

Некоторому газу передали количество теплоты 200дж. Представленный сам себе, он совершил работу при расширении 250дж.Определите , как и на сколько изменилась внутренняя энергия газа.

Answer 1

дано:

Q=200дж

A=250дж

найти:

U=?

решение:

U=Q-A=200дж-250дж=-50дж

ответ: энергия уменьшилась на 50дж

Answer 2

Calculation of Change in Internal Energy

To determine the change in internal energy of the gas, we need to consider the heat transferred and the work done by the gas during expansion.

Given: - Heat transferred to the gas: 200 J - Work done by the gas during expansion: 250 J

The change in internal energy of the gas can be calculated using the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat transferred to the system minus the work done by the system.

Mathematically, the equation is:

ΔU = Q - W

where: - ΔU is the change in internal energy - Q is the heat transferred to the gas - W is the work done by the gas during expansion

Substituting the given values into the equation:

ΔU = 200 J - 250 J

Simplifying the equation:

ΔU = -50 J

Therefore, the change in internal energy of the gas is -50 J.

Please note that the negative sign indicates a decrease in internal energy.