"Yes, Master, why don't you give you a lecture. I didn't know how long ago it was when I listened to your lecture last time."

Liu Yuan also wanted to hear some new theories from his master.

"Okay, then while everyone is so interested, I will simply share my understanding of air with you."

Li Kuan thought about it for a moment and agreed.

To enable physics and chemistry to develop rapidly, students must improve their understanding of matter itself.

As a common substance, gas is a common substance, if you don’t figure it out, many things will be troublesome to explain.

...

Although it was a temporary lecture, Li Kuan was not angry at all.

Just simply put out some common sense learned in junior high school and high school to tell you, it will be enough to cause a sensation.

"You can take a look. The beaker in my hand is the most common type in the academy's laboratory, and this whale oil candle is also used by everyone every day. After starting the lecture with you, let's watch a small experiment first."

In the lecture hall, it became crowded again.

However, this time, all the students who came to Guanshishan Academy were from the students.

"Now I lit this candle. If no one cares about it, the flame will not go out until the end without the candle. Then now I put this big beaker on the candle, and everyone will continue to see what will happen to this candle. Who of you come up to help me complete this action?"

In order to let everyone feel that the candle and beaker are the most common things, Li Kuan had a small interaction.

“I’ll do it!

As soon as Li Kuan finished speaking, a student raised his hand and walked straight to the stage.

"Prince, Dalang Li Desai of Duke Wei Guo suddenly said that he would come to the Academy of Physical Studies a few days ago, so I decided to agree."

Xu Jingzong explained softly in Li Kuan's ear.

Li Kuan nodded and said nothing.

Soon, Li Desai picked up the beaker and looked at it, then stared at the candle for a while, but found nothing, so he covered the beaker on the candle.

In the lecture hall, everyone stared at the candles in the beaker without saying a word.

After a few minutes, the candlelight inside flashed.

There was obviously no wind, but the flame was shaking.

This made everyone's spirit more focused on the candle.

"Ah! The candle is out!"

Suddenly, someone screamed.

Principle: The candle in the beaker plum is actually extinguished.

"Do you think it's strange why the candle is suddenly extinguished now? The candle that is not covered with the beaker next to it is burning well?"

Li Kuan was very satisfied with everyone's reaction, and coughed lightly and officially started the lecture.

"Is it because the candle burns and consumes all the air in the beaker, so it's extinguished?"

Di Renjie, who is good at thinking, thought about the vacuum inside the copper ball when he was experimenting with the copper ball just now, and thought that there would be a vacuum inside the beaker, so the candle was extinguished.

I have to say that under Di Renjie's question, many people think this seems to be a good explanation.

"If the air is exhausted, it will become a vacuum. If this is the case, the beaker will not be able to be uncovered casually. But look, I will move the beaker away as soon as I move it."

Li Kuan said while picking up the beaker.

In this way, Di Renjie's answer just now was completely overturned.

The air is under pressure, and if it is under vacuum, it is impossible to use human resources to uncover it.

"Can some things in this air have something to do with the burning of the candles, because the beaker covers the candles and when this part of the thing is consumed, it will be extinguished?"

At this time, Lu Zhaolin, who had not spoken much, put forward a very novel point of view.

From Li Kuan's perspective, this problem is basically a fact.

"The statement of Shengzhi is quite interesting. It seems that it can explain this phenomenon more than what I just understood. If there are several things in the air, it can explain the fact that the candle was extinguished just now, and it can also explain why the rotten eggs are so smelly in the air when they are opened."

Di Renjie added a sentence.

With the two of them taking the lead, the originally quiet lecture hall immediately became crowded.

"Everyone, calm down!"

After everyone was talking for a while, Li Kuan spoke out and told everyone to stop discussing.

"Some people have guessed the representative significance of this experiment just now. Whether it is burning this candle, burning firewood or honeycomb coal, it requires consuming a component in the air. I call the component required for this combustion oxygen.

How much does this proportion of oxygen account for? I hope everyone can explore this answer. So is there only oxygen in the air? The moment when the beaker was opened, I believe everyone knew that there must be more than one ingredient in the air."

Li Kuan did not go around too many circles and began to express his understanding directly.

"I don't know how many gases there are in the air. This answer needs to be found. But from the experiment just now, I can easily uncover the beaker, which means that in addition to oxygen, there are other gases in the air that account for a very high proportion.

At the same time, in different occasions, the other things in the air may be different. There should be many gases in this world that we don’t know. Is rotten eggs so smelly? Is it because there is something special gas emitted from it?

If the toilet is so smelly, will there be some special gas inside? Or if there was an explosion in the mine of the honeycomb coal workshop before, will it be caused by some special gas in the air? These answers need to be found by you."

Although Li Kuan knew that there was nitrogen, carbon dioxide, and some rare gases in the air.

I also know that the odor of eggs is due to hydrogen sulfide, and the explosion of coal mines is due to methane.

However, these things are directly said without explanation.

Besides, it doesn’t seem to be a good thing to pull out the seedlings too much to help grow.

So he simply said half of the talk, responsible for making various assumptions, and then asked the teachers and students of Guanshishan Academy to study.
Chapter completed!