Zhang Lang avoided Feng Xi and went to the side to connect the communication.
"Hunter, we have found an effective weapon to deal with bugs!" Fang Tianhua's voice was a little excited: "But I need your help!"
"What weapon?" Zhang Lang asked.
"Just now, Teacher Luo learned from the craftsmen in the city that thatched warehouses can be seen everywhere in the military camps in the city, storing a large amount of flammable materials!"
When Zhang Lang heard this, he immediately remembered what Luo Zhonghua had said when he first came to this world. This city was surrounded by a half-circle of city walls, with a highland fortress built against the bridge in the middle. The campsites in between were low-lying, like a circle of trenches...
"Are these flammable materials intended to be ignited when the insects break through the city wall?"
"That's right!" Fang Tianhua said: "This is the last line of defense for the fortress! Then do you know what those flammable materials are?"
"Kerosene?" Zhang Lang remembered the saying that this was an oil field.
"Yes, but not just!" Fang Tianhua said with a smile: "In addition to kerosene, there is also a lot of sulfur and saltpeter! This is also the source of the strange smell in the barracks!"
"Brimstone and saltpeter..." Zhang Lang squinted his eyes and thought of something...
"It's gunpowder!"
Fang Tianhua said excitedly:
"This is the main ingredient of gunpowder! If we can prepare gunpowder and create thermal weapons, we can definitely repel the bugs! Do you still remember the restrictions on this mission? It is not level one or level two, but only cold weapons. Weapons, this is actually a reminder given to us by the altar! It gave us a fortress full of raw materials, allowing us to make our own gunpowder weapons!"
Hearing this, Zhang Lang's eyes lit up: "What do you need me to do?"
"Apply to the marshal for a venue, and there are enough raw materials!" Fang Tianhua said:
"Although we have shown a certain ability, we have not yet produced any actual results. Our voice in the fortress is far inferior to that of you, and your General Feng..."
"Understood!" Zhang Lang nodded and immediately went back to tell Feng Xi what he meant.
"Research, new weapons?" Feng Xi heard this and said doubtfully: "This is not something that happens overnight..."
"My friends heard that there are a lot of sulfur and saltpeter in the city, and they came up with a formula!" Zhang Lang said: "It can be made into an extremely powerful weapon. No matter how hard the carapace is, it can't withstand it! But it requires raw materials and field testing!"
"Okay!" Feng Xi trusted Zhang Lang very much: "I will apply to the marshal right away!"
With Feng Xi's reputation and Zhang Lang's argument being well-founded, the marshal immediately asked people to cooperate and temporarily lent the school grounds to the reincarnations to study gunpowder.
As for the formula of gunpowder, anyone who has studied high school chemistry knows that besides sulfur and saltpeter, it is charcoal. The first two are available, and charcoal is even easier to get!
"I know that sulfur and saltpeter are flammable, but as you can see, fire attacks have limited effect on insects..."
Feng Xi also came over, watching them busy, and asked Zhang Lang curiously:
"Are things made from these materials really that powerful?"
Zhang Lang nodded: "If you use this thing well, it will be easy to crack mountains and rocks, let alone insects!"
Except for Teacher Luo, who was busy with the project at the top of the city, and Professor Yuan, who was in charge of dissection, all the remaining reincarnators came to participate in the experiment.
"In order to make it easy to burn, it has been ground into powder!"
Everyone placed the bags containing the powders of the three materials in the open space: "Let me see, monosulfide, dinitrate, and charcoal..."
According to the popular formula, Ye Peng took a little of each in proportion and mixed them together. In order to be precise, I also measured it with a small scale to make sure there was no problem...
In this way, a small amount of "black powder" was born. Everyone took tissue paper and wrapped it tightly, and used a cotton thread soaked in oil to draw it out. After lighting the cotton thread, they hid far away.
The cotton thread burned slowly until it reached the paper bag, quickly igniting the "gunpowder" inside.
As expected, the "gunpowder" lived up to its name. As soon as it encountered an open flame, it immediately burned violently. The flames jumped so high that the tissue paper was instantly reduced to ashes.
But the crowd didn't cheer. The burning was quite intense, but isn't that what it should be? Because the ingredients are all flammable, but that's not what they want. What they want is an explosion, an effect that can blast the enemy into the sky!
Is the proportion wrong?
None of the people present had ever prepared gunpowder, and their only impression of this ancient invention was the saying "monosulfide, dinitrate, and charcoal."
"Maybe it's not the weight, but the volume!" Ye Peng didn't give up yet. This time, he mixed three piles of materials together according to the volume and tried again.
The effect this time was better than before, but it was still far from the level of explosion!
Feng Xi immediately frowned and looked at Zhang Lang: "Is this what you said, the power of breaking mountains and cracking rocks?"
Zhang Lang shook his head and walked up: "This ratio is wrong! By weight, saltpeter, sulfur, charcoal, six to one to one!"
"Ah?" Ye Peng frowned and said, "What ratio is that? I've never heard of it!"
"No..." Shang Xue, who was wearing glasses, suddenly frowned, drew out his sword, and started drawing on the ground.
The land was scratched by the tip of the sword, leaving traces that formed a series of characters. When everyone took a look, they saw writing on the ground:
s+2kno3+3c=k2s+n2↑+3co2↑
"What kind of mess is this?" Fang Tianhua frowned.
"It's a chemical equation!" Liu Mofei explained: "But I don't know what the reaction is. The knowledge has been returned to the teacher long ago..."
"It's the reaction of the gunpowder explosion!" Lin Yiming, who is still in high school, said:
"S is sulfur, kno3 is potassium nitrate, which is also the main component of saltpeter, and c is charcoal! This formula is exactly one sulfur, two nitrates, and three charcoals!"
"That's right!"
Shang Xue finished writing, pushed up her glasses and said:
"I have also heard the saying "monosulfide, dinitrate and charcoal", but it is not a formula for gunpowder, but a formula compiled to facilitate students to remember the reaction equation of gunpowder. It is a modern thing, and of course it is used to test ancient formulas. No more!"
"Look at the reaction formula. When these three materials are burned, they will generate a large amount of nitrogen and carbon dioxide. The explosion of gunpowder is not caused by how violent the combustion is, but by the instantaneous production of a large amount of gas when burning! Therefore, we can only follow the reaction formula Match it in proportion!”
"Then knowing this reaction formula, can we know the formula of gunpowder?" Fang Tianhua is not interested in these things, he only cares about the results.
"Of course, just calculate the relative molecular mass!"
Shang Xue explained while making gestures with the tip of his sword on the ground:
"The relative molecular mass of sulfur s is 16, and monosulfur is 16; the relative molecular mass of saltpeter kno3 is 50, and dinitrate is 100; as for tricharcoal, c is 6, and 3c is 18, so the weight ratio of saltpeter, sulfur, and charcoal It should be 100 to 16 to 18, almost 75% saltpeter, 12% sulfur, 13% charcoal..."
After writing this, the girl with glasses looked at Zhang Lang in surprise: "The hunter is right, it's almost six to one to one!"
Feng Xi didn't understand her analysis at all... let alone the crooked symbols on the ground. But when she heard that she agreed with Zhang Lang's opinion, he couldn't help but feel a little happy. She turned around and asked, "Write what she said." What are they?”
Zhang Lang shook his head: "I don't know either..."
He really didn't know chemical formulas or anything like that, which was too out of line for a worker like him in the steam age. But he has at least come into contact with the formula of gunpowder. The formula circulated in his world is 6112, saltpeter, sulfur, and charcoal are 611. As for the 2, it is the powder of fire crystal!
However, except for his hometown, there should be no fire crystals in other worlds, so the formula for ordinary gunpowder should be 611.
Although this kind of ordinary gunpowder is also very powerful, compared with the gunpowder in his hometown, it lacks the catalysis of fire crystals and its power is greatly reduced.
Of course, what Zhang Lang didn't know was that he was a blind cat who encountered a dead mouse... In a chemical reaction, when a material is added, the weight of other materials usually changes accordingly.
But the problem is that this fire crystal is actually a kind of superpower crystal in this superpower world. It does not participate in the chemical reaction itself, but provides a kind of fire enhancement... So the fire crystal is removed, and the other three The ratio of materials does not need to be changed!
Ye Peng immediately started experimenting, and as the fuse burned, everyone's hearts were in their throats!
Finally, when the open flame came into contact with the gunpowder, there was a loud bang and a puff of smoke slowly rose. This time the papyrus wrapped in medicine did not burn to ashes, but exploded into pieces!
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