Rising: Ten Thousand Years Chapter 61: : Who taught it

"Water is coming!"

With a shout. But I saw several classmates guarding a classmate who was only wearing underpants and was drenched and ran over quickly.

Li Zhen nodded to the classmate: "Thank you."

Immediately, he took the bottled deep well water, poured the water into a beaker, and put the beaker full of well water into the basin filled with saltpeter:

"Saltpeter is mainly composed of nitrate, and its chemical name is also called potassium nitrate. In fact, after being mixed with ammonia gas, it will become ammonium nitrate... mainly speaking of saltpeter, which is easily soluble in water. So let you keep stirring because the saltpeter will continuously absorb the heat in the water during the process of dissolving in water. If the temperature of the cold water in this basin is at 15 degrees, then after your constant stirring at the moment, it is close to It's zero degrees."

Hearing what Li Zhen said, Qi Dengming, who was stirring profusely, reached out his hand to touch the water in the basin, and quickly retracted his hand as soon as he reached out, shouting in surprise: "It's so cold. Really. , It’s really cooling down. It’s cooling down.”

"I touch it too."

"Don't squeeze, I want to touch too."

"Don't touch it, your body temperature will make the water temperature rise, don't destroy the experiment." Xu Shenxue roared.

The excited students backed away resentfully, then Xu Shenxue also touched his hand in the water, and shouted in surprise: "Hey, it's really cold. I'm afraid it's already 0 degrees?"

Qi Dengming asked Li Zhen again: "Then you knew that adding saltpeter to the water could lower the water temperature. Why did you go to the extra trouble to get deep well water and put a new cup into this basin?"

Li Zhen said: "In the process of your constant stirring, although a large amount of saltpeter is dissolved and the water temperature is lowered, but at the same time, the equilibrium state among the water molecules is also constantly destroyed, which requires more pressure. So it is not easy to freeze. In fact, even if the water in this basin freezes, it is still undrinkable. Therefore, if we compare this basin to... a closed container that can cool down. Then the water in the basin This glass of well water is what really turns into ice."

"Why?"

"The temperature of the water in the basin has become extremely low. It will pass through this beaker to the deep well water in the beaker, thereby continuing to reduce the temperature of the deep well water. The temperature of the deep well water continues to pass, and when it reaches the freezing point, it will Frozen."

"Then what should we do now? Keep stirring?"

Qi Dengming asked.

Li Zhen smiled and shook his head: "No need. It has fully absorbed the heat. Now you just need to cover the mouth of the beaker with paper or plastic. Then cover the water basin with a wooden board. Cover the quilt for 30-60 minutes, open it, and the water in the beaker will complete the freezing process.”

"Huh? Why cover the beaker with plastic paper?"

"Prevent the temperature from escaping in the cup. The beaker needs to be kept constantly cold."

"Then why do you need to cover the basin with a quilt? Didn't it say that it was going to freeze? Wouldn't the water be warmed up if the quilt was covered?"

Li Zhen chuckled, did not answer this question, and left Youyou. Telling them the principle is far more useful than telling them some methods.

Maybe it's amazing how supersaturated sodium acetate freezes. But in fact, understanding the slow freezing process of nitrates is more useful for their pioneering thinking in chemistry.

After Li Zhen left, the chemistry teacher slapped the questioning student on the head angrily: "You don't know anything, don't talk too much, no one will treat you as dumb."

The student looked aggrieved: "What did I say?"

"You ignorant thing, put a quilt on top of this basin, and...you frankly heated up the water?"

The student said sincerely: "I really think Li Chen is wrong about this. That's right, the temperature in this basin is so low. You have to cover it with a quilt to keep it warm. This is not the opposite. Well."

"You...you...you ignorant thing!"

The chemistry teacher was so angry that he was about to vomit blood: "Why did I teach you such a thing."

"Teacher, am I wrong?"

"Ha ha ha ha."

The students around laughed wildly. At first they thought this student was joking. Seeing that he hadn't reacted yet, they all felt that they had hit the point of laughter for no reason.

Thinking about it carefully, it seems that there is nothing wrong with it. If you cover the quilt with water, wouldn't it be warm? Wouldn't it be warmed to cover the quilt with ice? Hmm...seems to make sense.

Some students brought their own quilts and covered them on the basin. A group of teachers and students stood by and waited anxiously.

Xu Shenxue kept frowning: "Is it time yet?"

More than anyone else, he wants to see the results.

"Principal, it's only ten minutes."

"Why does time pass so slowly."

“…”

"Is it time yet?"

"Only twenty minutes."

“…”

"It's half an hour."

"Quick, lift the quilt."

All the people in the chemistry laboratory gathered around. When the quilt was lifted, they could only see white smoke constantly coming out of the basin. It was a chill.

As the quilt was lifted, it seemed that the temperature in the entire laboratory dropped. I don't know if it was a psychological effect.

However, in the center of the water basin, in the beaker, half an hour ago, it was a cup of deep well water, but now it has all solidified into a cup full of ice. The ice is constantly blowing cold, and the smoke is curling up.

"Ah!"

"It's really freezing!"

"This... this is edible ice."

"It's just autumn, and the weather is so hot, is there really ice that only appears in winter?"

"Saltpeter... isn't that something used to make bombs? It can freeze water."

"I seem to have learned a great science. This... will be a blessing in the summer."

"Oh, Li Zhen really is Li Zhen, there is nothing hard to get him."

“…”

Xu Shenxue stretched out his hand to touch the ice in the cup, only to feel the bone-chilling cold, this is real ice. He reached out to touch the water in the basin again, and the water in the basin was still at the same temperature without changing. Can't help but be full of doubts, it seems to have figured out something, and it seems to have overlooked something.

His eyes became serious, and he said in a loud voice: "Compile today's story into a book. Write down in detail how the supersaturated solution of sodium acetate freezes and the way saltpeter freezes. Write down what Li Zhen said Every principle and every word of the book is written in detail. When it is printed, every student in the chemistry department of our school must have a copy.”

"Yes principal~IndoMTL.com~Of course, I'm going to ask Li Zhen for advice. This is his patent."

"Yes principal."

“…”

Walking out of the teaching building, Xu Shenxue felt a little depressed. Why did Li Zhen have such a powerful knowledge.

"As Qian Mao said, putting Li Zhen in college for six years is really... a waste of six years."

"Oh, but how can I help him. He never asked me anything, and never said what he thinks about the future."

"The phoenix landed in the chicken coop, Li Zhen, Li Zhen, you should fly to the wider sky."

Xu Shenxue's heart was full of grotesque thoughts, and he felt more and more that he had wronged that child Li Zhen...

In the private dormitory, Qi Lengzi ran over from the teaching building in great surprise: "Hahaha, it's really freezing, you are so amazing."

Li Zhen, who was reading a book, smiled: "It's nothing special."

"It's amazing. How do you know? Who taught you these things?"

Li Zhen's whole body shook suddenly, and the book in his hand fell to the ground.

His eyes were full of incomparable shock and incomparable doubt, and he muttered:

"Yes, how do I know? Who taught me? These things... where did I learn?"

"Did someone very important teach me? Who is she. Who is she?"

Suddenly, with a pain in his heart, Li Zhen quickly took out the piece of paper in his arms and kept murmuring: "Zhang Zhi... Zhang Zhi. Why am I so afraid that I will forget these two words."

"Qi Lengzi."

"What are you doing?"

"Help me find a needle."

"What are you doing?"

“…”