In the whispers of the audience, Jiang Wei commanded to remember and bring the prepared steel plate.

In a moment, Li De and a young man like black carbon carried the steel plate to the stage and placed it on the wooden board.

After Jiang Wei motioned for them to go down, he poured the dry ice in the basin on the iron plate, and in order to prevent the molten iron from flowing everywhere, he dug a small pit in the middle of the ice pile, and then stood up.

"Ladies and gentlemen, all truth comes from practice, and practice produces truth. This is a sentence summed up by the immortals, if you don't do anything, you will only talk about it, and you will never get the truth. Next, we first poured 1,500 degrees of molten iron into dry ice with a temperature below minus 78 degrees Celsius to see what happened. ”

The air under the audience froze suddenly, some people swallowed a mouthful of saliva, some people lifted their hearts, some people couldn't take their eyes off it, and some people's brains kept using their imagination. Gao Yang nervously grabbed Changle's hand, her limited brain thought that nothing could stop the molten iron at such a high temperature.

Under the gaze of everyone, Jiang Wei beckoned and asked Xiao Shi to pour molten iron.

The little official looked at the yellow and clear molten iron, sweat kept flowing down, according to his experience, the molten iron was no problem on this iron plate, and it was wide enough to prevent the molten iron from flowing to the wood. But his only concern was the ice, for fear that the molten iron would react violently as soon as it came into contact with the ice and splash on himself.

"I'll do it anyway."

Jiang Wei saw that the little official was slow to move, and had no choice but to take the iron clip from Xiao Shi's hand.

The people in the audience saw that the little official didn't dare to pour molten iron, and their hearts were a little hairy, and they subconsciously felt that this was very dangerous, and everyone's first thought was the same as Xiao Shi, and there would definitely be a violent reaction, just like water splashed on the red-hot iron.

Will the high-temperature substances that are sputtered everywhere cause fires?

In full view of everyone, everyone almost held their breath, Jiang Wei took the iron tongs, and the clamp jar poured the molten iron on the ice.

Nothing happened, except for the slight bounce of molten iron on the dry ice, which seemed to show no signs of melting.

Everyone's brains were almost short-circuited, rubbing their eyes and watching this scene in disbelief.

Princess Gao Yang couldn't help but exclaim, feeling as if she had seen a miracle.

How can ice and molten iron with such a large difference in temperature not have anything at all?

"Are you confused?"

Almost everyone wants to ask why? I saw Jiang Wei smile faintly,

"It's actually quite simple, because for ice to melt, it first has to absorb heat before it melts. Through this practice, the immortals have learned the truth that it takes a process for anything to absorb heat, but in fact, the ice is disappearing little by little, but the process is a little slow. ”

This is just a high school physics knowledge, but it is obviously too shining for people in this period of the Tang Dynasty. It also gives them a deep understanding of what the truth really is.

Jiang Wei said this for this. After all, in this era, most of them are metaphysical, and what he does is to spread materialist ideas.

Materialism is antithetical.

So what Jiang Wei has to do is to bind God and materialist thoughts. The myth of the gods is defined as the study of science and immortality, not blind deism.

It's like writing a novel, giving the immortals a whole new setting.

And these are all visible and tangible, not ethereal, but they bring infinite magic to people.

Of course, in ancient times, a lot of modern knowledge is really no different from immortal arts for them.

Fang Xuanling sat on the chair and fell into deep contemplation. He looked at Jiang Wei on the stage, his eyes flashing with a wonderful brilliance.

At this time, the molten iron on the dry ice gradually turned gray, Jiang Wei asked Xiao Shi to take the iron away, and then continued,

"You have seen the reaction of dry ice with molten iron at thousands of degrees, and it is beyond your expectations. So, if dry ice at minus 78 degrees Celsius comes into contact with water at room temperature, will the water turn into ice? Or maybe something else will happen? As we said earlier, when water freezes and the temperature reaches zero, what will happen to the reaction with water? ”

Everyone in the audience began to look forward to it again, because what Jiang Wei did always subverted their common sense.

Jiang Wei poured dry ice into the iron basin, and a magical scene appeared.

"Wow!"

This scene made the audience exclaim.

At first glance, I saw a constant white mist pouring out of the iron basin, and for a while the podium seemed to have become a fairyland on earth, and Jiang Wei, who was standing next to the iron basin with white hair and white clothes, now seemed to have become an immortal in the smoky white fog.

"Isn't it amazing, but it's just that after the dry ice comes into contact with the water, the dry ice absorbs a lot of heat, so it becomes a gas, which is carbon dioxide."

"As I said earlier, the temperature of dry ice is minus 78 degrees, because dry ice absorbs heat, so the water vapor in the surrounding air reduces the temperature because of carbon dioxide, so that the water vapor forms water droplets, and these countless water droplets are the white water mist, which is the same as the clouds in the sky. It is precisely because of this truth that there is the immortal art of rain. And immortality is not an ethereal thing, it is established by truth. ”

Speaking of this, Fang Xuanling suddenly woke up, he completely blocked the immortal technique that Jiang Wei said, and heard the reaction between carbon dioxide and water, as well as the condensation of water vapor and water mist.

At this time, someone in the audience asked.

"It's also heat absorption, why don't molten iron and dry ice have water mist?"

Jiang Wei smiled and looked at the person who was asking, this person was Princess Shahel.

Princess Shahr smiled sweetly when she saw Jiang Wei looking at her.

Gao Yang next to him saw it and snorted softly, dog man and woman.

At this time, Jiang Wei looked at Princess Shahr with a smile,

"Because the temperature of the molten iron is too high, the surrounding temperature can't be lowered by dry ice."

Princess Shahr didn't know what was going on and felt a little hot in her face. At this time, Jiang Wei continued to speak,

"Everyone understands that when water freezes, the temperature needs to reach zero, and dry ice freezes, it needs to reach minus 78 degrees. So, what about combustion? How many degrees does it take to burn? Next, I will show you a practice of using water to make fire. ”

"Water can make fire?"

Gao Yang felt that his brain was not enough.

The boy also frowned and pondered, didn't the water extinguish the fire? Why is it possible to make fire?

Jiang Wei smiled,

Do you think this is contrary to common sense? I think you have all experienced and practiced water to extinguish fires, so you have come to the truth that water can extinguish fires. So under what circumstances can water make fire? ”

Jiang Wei took out a piece of paper,

"In one truth, then if another truth interferes, then things change. Next, please take a look at how water makes fire. ”