Question

1 Рассчитать энергию, которая потребуется для плавления ртути массой 2 кг , взятой при температуре -89 °С. Изобразить процесс графически.Ответ дать в килоджоулях. Далее Завершить

Answer 1

Решение на двух листках

Answer 2

Calculation of Energy Required to Melt Mercury

To calculate the energy required to melt mercury, we can use the formula:

Q = m * L

Where: - Q is the energy required (in joules) - m is the mass of the substance (in kilograms) - L is the specific latent heat of fusion for the substance (in joules per kilogram)

For mercury, the specific latent heat of fusion is approximately 11,000 joules per kilogram (J/kg).

Given that the mass of the mercury is 2 kg and the initial temperature is -89 °C, we can calculate the energy required as follows:

Q = 2 kg * 11,000 J/kg = 22,000 joules (J)

Therefore, the energy required to melt 2 kg of mercury at -89 °C is 22,000 joules (J).

Graphical Representation of the Process

To graphically represent the process of melting mercury, we can create a simple line graph. The x-axis represents time, and the y-axis represents temperature.

At the initial temperature of -89 °C, the graph would show a horizontal line at -89 °C. As heat is applied to the mercury, the temperature will gradually increase until it reaches the melting point of mercury, which is -38.83 °C. At this point, the temperature will remain constant until all the mercury is melted. The graph will then show another horizontal line at -38.83 °C.

Here is a graphical representation of the process:

     Temperature (°C)
       |
       |
       |
       |
       |
       |_____________________
       -89       -38.83
       Initial   Melting
       Temperature  Point

Please note that the graph is a simplified representation and does not take into account any fluctuations in temperature during the melting process.

I hope this helps! Let me know if you have any further questions.