Teacher Claire's idea was actually very simple, she originally wanted the aristocratic headmaster to strip naked and run around the square ten times, but considering that the school was full of pure girls, she couldn't pollute their hearts with that filthy scene, so she could only give up and choose such a special punishment plan.

Reiner doesn't want to be the world's first women's clothing boss, but with the information he has obtained so far, he should not be punished, and in turn, he wants to play a little trick on this stubborn young teacher.

"I accepted this proposal, but Teacher Claire, if Xia Luo is correct, then what should I do, how are you going to compensate this student?"

Hearing Reiner's words, Teacher Claire frowned slightly, she didn't think she would lose, as she said, most of the alchemy achievements in the past three hundred years were based on the theory of fire element combustion, which was the cornerstone of modern alchemy.

"What do you want me to do?"

Teacher Claire stared at Reiner with a look that looked disgusting, as if she had something bad in mind.

"It's easy, in exchange, you'll have to wear a maid's outfit for a week."

Through memory, Reiner knew that of course there were maids in this world, and they were maids in the pure sense, and he didn't actually want to embarrass Teacher Claire, but he should also give her a taste of hardship, so he made this slightly disgusting request.

"Maid outfit?"

Men in this era have obviously not awakened to that strange fetish, and Mr. Claire can't understand the original intention of Reiner's request, but since it's a maid outfit, it also means that Reiner wants to serve him like a maid?

I don't know what strange things came to mind, Teacher Claire was a little embarrassed and wanted to refuse, but after thinking about it, how could she lose, so she nodded and readily agreed.

"Okay, let's use the experiment to see who is right."

The three of them arrived at a vacant alchemy classroom, which was often diverted for other purposes due to the school's limited funds, so there were not many classes in alchemy left.

Reiner was a little surprised, the alchemy equipment of this era had become quite modern chemistry laboratory, whether it was an alcohol lamp or a flask beaker, it had become the standard, and there were many special-purpose laboratory equipment.

The experiment was simple, calcium carbonate was heated and decomposed into calcium oxide and carbon dioxide, a formula that Reiner was very familiar with, and on Earth, this chemical formula can be found in any edition of junior high school chemistry books.

Since carbon dioxide dissolves in water and has a greater gravity than air, it can only be collected by the upward exhaust method, and Reiner assembles the relevant equipment, which seems to be a bit redundant, which makes Mr. Claire frown, thinking that he is just playing tricks.

After weighing the mass of several limestones, Reiner pulled a conduit from the sealed container containing limestone and threaded it into the bottom of a sealed flask, and then inserted another conduit into the upper part of the flask, extending it into the pool to verify that gas was indeed produced during the heating process.

Lighting the flame, because the commonly used alcohol lamp cannot stably heat the limestone to the temperature required for the reaction, so Xia Luo assisted in casting a rudimentary fire technique, which is also the magic that Reiner saw with his own eyes, the blazing flame jumped on Xia Luo's fingertips, but it did not burn her skin at all, and with Xia Luo's mind changed appearance, it was really impressive.

"At most, some air will bubble up the duct because of the expansion of the heat, and you are ...... in vain."

Before Ms. Claire could finish her sentence, she saw a bubble popping out of the catheter that had reached into the pool.

But this was only the beginning, and soon, a steady stream of bubbles appeared from the catheter, no doubt due to the new gas produced in the experimental setup.

"This ......"

Ms. Claire was speechless, staring at the experimental device as if it were some kind of trick-trick prop.

Three times in a row, Reiner and Charlotte repeated this to make three bottles of gas.

Of course, Reiner did not discard the calcined white rock, that is, calcium oxide, he threw it into a beaker filled with water, and the white stone immediately made a sizzling sound, emitted white smoke, and soon dissolved in the water and disappeared.

Calcium oxide reacts with water to form a calcium hydroxide solution, one of the biggest uses of this solution in chemistry is to test carbon dioxide.

Of course, the reason why Reiner prepared this solution was also to verify whether his knowledge of chemistry and the alchemy knowledge of this world coincided, and there was no doubt that the two were the same, although Reiner could not explain what the so-called magic was, but at least he confirmed that the foundation of this world was no different from that of Earth.

"You can clearly see that in the course of the experiment, gas was produced, right, Mr. Claire?"

Reiner asked, observing the young dean's expression with interest, and found it very interesting.

Teacher Claire was silent, her mind constantly thinking.

According to Master Hohenheim's theory, during the combustion process, the fire element in the object is released into flames, and the rest is ashes, but the existence of gas is never mentioned in this, and the mass reduced during combustion is usually considered to be the mass of the fire element, but now it seems that this gas also has a part? Or is this the nature of the fire element?

Seeing that Mr. Claire was silent, Reiner lit another match and poked it into the mouth of one of the flasks, and it was clear that the originally vigorous flame was extinguished in an instant, and it was obvious that the air was not a fire element, but some kind of gas that could stop the combustion.

Teacher Claire was completely speechless.

Reiner didn't stop there, he poured one of the vials of gas into the liquid that dissolved the white rock, and saw that the water level in the flask continued to rise, and at the same time, the originally clear solution also became cloudy, and it seemed that a gray precipitate appeared.

Now even Xia Luo felt a little strange, her own experiment was over just now, and the rest of it looked like this principal had played it improvised by the principal himself?

Reiner weighed the mass of the turbid solution and the experimental apparatus, and subtracted the mass of the individual apparatus and the mass of the water, and the data obtained was clearly compared with the mass of the limestone before the experiment, and it was almost identical to the error of the experimental measurements.

"That is to say, before and after the experiment, the mass of the limestone dispersed into the mass of the gas and the mass of the white rock, not the mass of the fire element and the ash in the theory of ignorant combustion."

Reiner concludes that he is well aware that the theory behind this experimental phenomenon is the most common and important fundamental law of nature, one of the cornerstones of the progress of civilization on Earth, and although he does not know much about the development of this world, Reiner also believes that this law will play a vital role in the future development.

First of all, this series of experimental phenomena had a huge impact on Teacher Claire, she only felt that the world was spinning, and her eyes were dark, and she actually fainted.