Question

Объясните, почему количество теплоты отданное горячей водой, меньше количества теплоты, полученного холодной водой? ​

Answer 1

Ответ:

В условиях полной тепловой изоляции (абсолютный термос) они равны. Иначе часть тепла расходуется на нагрев атмосферы и тепловое (инфракрасное) излучение.

Answer 2

Explanation of the Temperature and Heat Transfer

When considering the transfer of heat between hot and cold water, it's important to understand that heat transfer occurs from a higher temperature to a lower temperature. This means that when hot water is mixed with cold water, heat will flow from the hot water to the cold water until thermal equilibrium is reached.

Specific Heat Capacity: One key factor in understanding this process is the concept of specific heat capacity. Specific heat capacity is the amount of heat energy required to raise the temperature of a substance by a certain amount. Different substances have different specific heat capacities, and water has a relatively high specific heat capacity compared to many other substances.

Calculation of Heat Transfer: The amount of heat transferred can be calculated using the formula Q = mcΔT, where Q is the amount of heat transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

Comparison of Heat Transfer: When comparing the heat transfer from hot water to cold water, it's important to consider the initial and final temperatures of the two bodies of water. The heat transfer will be influenced by the mass and specific heat capacity of each body of water, as well as the temperature difference between them.

Application of the Concept

In the specific case of hot water being mixed with cold water, the amount of heat given off by the hot water will be less than the amount of heat gained by the cold water. This is due to the higher initial temperature of the hot water and the lower initial temperature of the cold water. As the two bodies of water mix and reach a common final temperature, heat will flow from the hot water to the cold water until equilibrium is achieved.

Conclusion

In summary, the amount of heat given off by hot water is less than the amount of heat gained by cold water when the two are mixed due to the differences in their initial temperatures and the principles of heat transfer. This is a fundamental concept in thermodynamics and heat transfer processes.

- Source: '67'