Question

Какими способами можно изменить внутреннюю энергию? Какое количество вещества содержится в 200 г воды?

Answer 1

1) изменить температуру или объем газа

2) n = m / M = 0,2 / 18*10^-3 = 11,1 моль

Answer 2

Ways to Change Internal Energy:

To change the internal energy of a system, several methods can be employed. These include adding or removing heat, doing work on or by the system, and changing the amount of matter in the system. Adding or removing heat can increase or decrease the internal energy of a system, while doing work on or by the system can also change its internal energy. Additionally, changing the amount of matter in the system can alter its internal energy as well.

Amount of Substance in 200g of Water:

The amount of substance in 200g of water can be calculated using the formula:

\[ \text{Amount of substance} = \frac{\text{Mass (in grams)}}{\text{Molar mass (in g/mol)}} \]

The molar mass of water (H2O) is approximately 18.015 g/mol. Therefore, the amount of substance in 200g of water is:

\[ \text{Amount of substance} = \frac{200 \, \text{g}}{18.015 \, \text{g/mol}} \approx 11.1 \, \text{mol} \]

So, approximately 11.1 moles of water are contained in 200g of water