psychochemist

Chapter 397 The Thermite Key
The way people deal with problems at the time of desperation determines the pattern of people.It's not about knowledge and age.

After Yu Fan's words, everyone present seemed to see hope again, did Yu Fan think of something?

Zuo Zi sneered: "You still talk stubbornly when you are about to die, who do you think you are?"

Yu Fan didn't pay attention to Zuo Zircon, he knew that it was a race against time, and he had wasted too much time before.

Yu Fan walked to the door and touched the big black lock that locked the door with his hand, and then said to Chen Xiangyang: "Old Chen, let's get this open, and then rush into the car to pull off the emergency brake." , stop the train."

Chen Xingyang said anxiously: "I'm going, Lao Yu, are you kidding me? Such a thick lock, how can I open it? With my teeth? Zuo Zi, this old Yinbi, threw away the keys."

Yu Fan showed a mysterious smile and said, "Of course I won't let you bite with your teeth, we will use—chemical."

Chen Xingyang said very incomprehensibly: "Old Yu, how can there be any chemical reagents here for you to use? You are a clever woman who can't cook without rice."

Yu Fan: "That's not necessarily true. The floor of the old-fashioned train like 8444 has already been stained with rust, right?"

Chen frame Yang didn't understand what Yu Fan was talking about.

Yu Fan: "Old Chen, use a knife to slash the floor and lift it up!"

Although Chen Xingyang didn't understand, he immediately carried out Yu Fan's instructions.He picked up the knife that fell off the ground, cut a crack in the rubber floor, and pried it open with the knife.I saw that the exposed metal floor was indeed covered with rust.

Yu Fan: "Old Chen, help me quickly collect the rust, and then pound the rust finer." Chen Xingyang immediately scraped the metal plate on the ground with a knife, and Yixin also came to help lift the rubber floor, Rust collects quickly.

Yu Fan said to Mo Li again: "Mo Li, give me the silver powder in your pocket."

With a dazed expression on his face, Mo Li took out his small jar from his pocket, and asked Yu Fan suspiciously, "Teacher Yu, is it this?"

Yu Fan nodded, took the small jar of silver powder, and said, "That's right, that's it. Mo Li, you've done a great job!"

Until now, everyone still looked at Yu Fan blankly, no one knew what Yu Fan wanted to do.

Yu Fan said to Chen Xingyang: "Okay, the rust is almost gone."

Yu Fan took a piece of paper from the driving log on the wall, poured the rust on it, and weighed it with his hands, as if he was estimating the weight.Then Yu Fan unscrewed Moli's silver powder jar, tapped the bottom of the jar lightly with his hand, and popped out the silver powder inside little by little.Yu Fan's technique is very stable, which he has practiced in chemical experiments for a long time.

Chen Xingyang, Mo Li, and Yixin looked around curiously, they didn't know what Yu Fan was configuring.But seeing Yu Fan's confident expression, they felt that the train was saved.

While preparing the ingredients, Yu Fan said, "You all must still remember the king of chemical reactions in middle school, right?"

Chen Xingyang, Yixin, and Mo Li were stunned!
Seeing them like this, Yu Fan shook his head helplessly, and said, "It's the unfailing No.1 on the list of violent chemical reactions in middle school? The most violent reaction!"

Chen Xiangyang suddenly realized, clapped his hands and shouted: "Aha! I remembered, it was a hydrogen explosion, right? I was terrified at the time, hahahaha."

Yixin also grinned and echoed: "Yes, yes, that's the one, I remembered, haha. You want to create hydrogen to blow open the door, right? What metal produces hydrogen?"

Yu Fan stopped what he was doing, and raised his head in disbelief to look at Chen Xingyang and Yixin.Then he shook his head, immersed himself in the preparation of materials, and said, "It's not that. What I want to talk about is the thermite reaction. How did you learn chemistry in middle school?"

Chen Xingyang showed an embarrassed smile, and said as if he remembered: "Yes, yes, I just wanted to say, the thermite reaction, the most powerful one in middle school chemistry, and the explosive power. Hi! , I haven’t reviewed it for a long time, I forgot.”

Yixin also echoed: "That's right, the thermite reaction, the explosion was so loud, our chemistry teacher almost blew up the classroom when he did that experiment. By the way, Mo Li, it's been too long since we both graduated Ke Yuan, but you are still a middle school student, why don’t you know?”

Mo Li: "I haven't learned that yet..."

Yu Fan: "Okay, okay, stop making trouble, there is no explosion in the thermite reaction. Thermite reaction is a heat-generating reaction with aluminum powder and iron oxide as the main reactants. When the temperature exceeds 1250 ° C, the aluminum powder is violently oxidized , Combustion and release a lot of heat. The temperature of this exothermic reaction can reach above 3000 ° C. Thermite reaction is very rapid and the action time is very short. Two moles of aluminum and one mole of ferric oxide can be To trigger this reaction, the composition of the underground rust happens to be ferric oxide, and then it is mixed with Moli’s aluminum powder, um, this ratio is just right. This amount is enough to melt the big black lock! Haha, it’s done!” Yu Fan clapped his hands and shouted.

At this time, Chen Xingyang showed a very worried expression, supported Yu Fan's shoulder and said, "Old Yu... I don't know if I should say something or not?"

While wrapping up the prepared thermite, Yu Fan said, "Tell me, don't get ink stains." Yu Fan immediately turned his head and said to Yi Xin, "Lend me your lighter, and we'll open the door later." It's on, please hurry up and pull the emergency brake."

Chen Xingyang coughed twice, and said, "Old Yu, I don't really want to pour cold water on you. But did you make a mistake in the formula? You just said that thermite uses two parts of aluminum and one part of rust , right?" Although Chen Xingyang's expression was very amateurish, everyone could understand it.

Yu Fan: "Yes, what's the problem?"

Chen Xingyang pointed to Moli's jar and said, "But, the jar clearly says 'silver powder'!!! And you said just now, let Moli bring the jar of silver powder...Old Yu, you I made a mistake, you put silver powder instead of aluminum powder!" Ah! ! !

As soon as these words came out, Mo Li and Yi Xin turned pale with shock, and the little hope that had been ignited just now was immediately extinguished by a basin of cold water.

Why is good fortune so tricky?Why does life always give people hope again and again, and then extinguish the hope in front of them again and again?Why in the end, people's efforts are in vain?

However, an abnormal scene appeared.Logically speaking, Yu Fan should stop immediately and rethink his countermeasures.But Yu Fan completely ignored Chen Xingyang's words as if he didn't hear Chen Xingyang's important information.Yu Fan wrapped up the thermite, walked to the door calmly, and put the thermite on the lock.

Yu Fan looked sideways at Zuo Zir who was sitting next to him on the ground, and said confidently, "Professor Zuo, this is my answer."

　Confidence comes from success, knowledge comes from failure - ferric oxide
　　
　
(End of this chapter)