Chapter 512

Name：Black-bellied Movie Emperor's Clever Wife Author：Quan Quan
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"He changed the molecular structure of calcium carbide!"

“Exactly！”

Zhang Youcheng asked, "what is that layer of oil?"

"For industrial purified oil, in order to avoid the burning or explosion of calcium carbide with water, a small amount of purified oil is usually added when calcining calcium carbide to reduce the generation of acetylene gas and prevent disasters, which also plays an environmental role." He explained slowly, "in addition, he added a small amount of graphite powder!"

"Graphite powder?" Cao Zhen felt that his brain had been tied up. He could blame that he didn't learn chemistry well when he was a child.

Once the calcium carbide is fired, it will be prohibited to use water or foam to extinguish the fire. Carbon dioxide is also invalid. We must use dry graphite powder or other dry powder (such as dry sand) to put out the fire.

People's doubts became more intense.

"Isn't it a contradiction to put out the fire and make a fire one moment?" Jing SA asked.

"No, it's not contradictory at all. It's the best part of the killer."

The crowd stopped interrupting, and he continued to explain.

"When the murderer killed, he only brought a piece of calcium carbide. According to the volume of water, the size of the stone is about two red bricks, which is about the same size as the stone found at the scene of the crime. The outer layer is covered with purified oil added with graphite powder. Before killing, he will make the dead lose consciousness, then put the dead into a container full of water, and then burn the calcium carbide, Because graphite powder is added to the purified oil, the danger of calcium carbide combustion is eliminated. After baking at high temperature, the chemical molecular structure of calcium carbide also changes, becoming the same as that of sodium peroxide! "

Cao Zhen said: "wait a minute, you said that if you want to burn a stone, how to burn it? Although it's not big, if you burn it at the scene, there will always be traces. This is the same as boiling water. Since you want to burn it, you have to set up a bonfire at least."

"It doesn't need to be that much trouble, just a butane gas gun and a briquette tongs!"

Butane gas jet guns are not very tall things. You can buy one for 40 yuan. They are sold on Taobao. They are mostly used for baking and welding cakes. They are very small and easy to carry. The maximum temperature can reach 1300 ℃. It may only take three or four minutes to burn a stone.

And the briquette tongs are more common, can not be more common things, also known as tongs.

So, bonfires and stoves are not needed at all. They don't even need to make a fire. The killer just needs to clamp the stone with a briquette tongs and bake the stone with a flamethrower. It's absolutely time-saving and labor-saving.

No wonder there are no other signs of burning at the scene,

A stone, a butane air gun, a briquette tongs, and an ordinary sized sports backpack can be more than enough. Compared with four gallons of water, it's too small. Even walking in the downtown, it won't make people feel abrupt. I really have to admire the murderer's strategy.

He continued, "after the calcium carbide is heated, the killer will throw it into the water. It will react with the carbon dioxide in the water and generate oxygen. Once there is oxygen, the white phosphorus in the water will catch fire because the water temperature reaches the ignition point, and the dead will be burned to death. In the process of combustion, the purified oil and graphite powder will be consumed slowly, When the effectiveness of calcium carbide heating begins to decrease, they will be exhausted. That's why when testing water, graphite powder and purified oil can't be found. It sounds very complicated. In fact, it's a ring by ring chemical equation! " After a pause, she took a sip of water. "To put it simply, the murderer retained the characteristics of calcium carbide, removed its shortcomings, and created his ideal murder weapon. If you are interested, I can show you this chemical equation. The program is very complicated. It will take a day and a night to talk about it in detail."