Question

5. Тілу передали кількість теплоти у 223 Дж, внаслідок чого його внутр. енергія змінилася на345 Дж. Яку роботу виконали над тілом?​

Answer 1

Ответ:

122 Дж

Объяснение:

ΔU=345 Дж    Q=223 Дж     A=?

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A=ΔU-Q=345-223=122 Дж

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Answer 2

Calculation of Work Done on the Body

To determine the work done on the body, we need to use the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Mathematically, this can be expressed as:

ΔU = Q - W

Where: ΔU is the change in internal energy of the body, Q is the heat added to the body, and W is the work done by the body.

In this case, the heat added to the body is 223 J and the change in internal energy is 345 J. We need to find the work done by the body.

Calculation:

ΔU = Q - W

345 J = 223 J - W

To find the value of W, we rearrange the equation:

W = Q - ΔU

W = 223 J - 345 J

W = -122 J

Therefore, the work done on the body is -122 J.

Note: The negative sign indicates that work is done on the body, rather than by the body.