Question

Почему молекулы газа при соединении разлетается, а не соединяются ?

Answer 1

Молекулы газа состоят из атомов. Атом состоит из большого положительного ядра и маленьких отрицательных электронов, которые вращаются вокруг ядра. При соединении молекул, атомы этих молекул приближаются, и положительно заряженные ядра начинаются отталкиваться с ядрами других атомов. Вот поэтому молекулы разлетаются.

Answer 2

Why do gas molecules disperse instead of combining when they come into contact?

When gas molecules come into contact, they can either disperse or combine depending on various factors such as temperature, pressure, and intermolecular forces. In most cases, gas molecules tend to disperse rather than combine. This is because of the following reasons:

1. Kinetic Energy: Gas molecules possess kinetic energy due to their constant motion. This kinetic energy causes the molecules to move randomly and rapidly in all directions. When gas molecules come into contact, their kinetic energy causes them to bounce off each other and move away, leading to dispersion.

2. Intermolecular Forces: Gas molecules have weak intermolecular forces compared to liquids and solids. These weak forces are usually not strong enough to hold the gas molecules together when they collide. As a result, the molecules disperse rather than combine.

3. Collision Frequency: Gas molecules collide with each other frequently due to their high mobility. These collisions can be elastic or inelastic. In elastic collisions, the molecules bounce off each other without any change in their kinetic energy. In inelastic collisions, the molecules may exchange energy but still disperse after the collision. The frequent collisions and the random motion of gas molecules contribute to their dispersion.

4. Entropy: Entropy is a measure of the disorder or randomness in a system. When gas molecules disperse, the system becomes more disordered, which increases the entropy. According to the second law of thermodynamics, natural processes tend to increase the entropy of a system. Therefore, the tendency of gas molecules to disperse is in line with the increase in entropy.

It is important to note that under certain conditions, gas molecules can combine to form compounds or react with other molecules. These conditions may include high pressure, low temperature, or the presence of catalysts. However, in general, gas molecules tend to disperse rather than combine when they come into contact.

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