In the hot sun, a bottle of iced coke will make people feel very comfortable. But in Xiao Yuan, Changsha, a bottle of iced coke fell to the ground. When he picked up the lid, his finger was accidentally blown into a fracture.
So, under what circumstances will iced coke explode? How much harm can the exploded coke do to human body? The Morning Post reporter invited all kinds of physics gods to answer questions.
Changsha News In the hot summer, carbonated drinks are an artifact for many people to relieve the heat, especially after being chilled. However, you should also pay attention to the possibility that iced soda drinks will burst. On July 3 1 day, the reporter learned from Hunan Provincial People's Hospital that Changsha Xiao Yuan was blown into a fracture by iced cola.
Xiao Yuan, 20, is a junior in a university in Changsha. During the summer vacation, he rented a house in Changsha and planned to go abroad for foreign language training. Before dinner on July 29th, as usual, Xiao Yuan took out a bottle of iced coke from the refrigerator and accidentally dropped it on the ground. Just as he picked up the coke and opened the bottle cap, the coke bottle suddenly burst, and the bottle mouth of his left hand was blasted with a hole.
Xiao Yuan screamed, and his family rushed to see that his left hand could not move and the wound was bleeding. He was immediately sent to the provincial people's hospital for treatment. X-ray examination showed that Xiao Yuan had fractured the proximal phalanx of his left thumb and needed surgical fixation. That night, the hospital operated on Xiao Yuan, and the two-hour operation was successfully completed. After the operation, Xiao Yuan's left hand needs to be fixed with plaster for 4-6 weeks.
"I didn't expect that drinking a bottle of iced coke would lead to such serious consequences." Xiao Yuan said. More importantly, the doctor said that due to Xiao Yuan's deep wound and large wound surface, there may be scar contracture in the future, which will affect the joint mobility of the injured finger.
According to the analysis of Li Xing Bridge, the gold medal winner of the 49th International Physics Olympiad and Changsha Yali Middle School, the explosion of iced coke after landing and lifting the lid is related to the internal pressure of the coke bottle.
Coke is a carbonated drink with carbon dioxide dissolved in it. At the moment of landing collision, the coke bottle vibrates violently, the solubility of coke decreases, and carbon dioxide will be released from it, resulting in an increase in air pressure. When the air pressure rises, it is easy to cause the bottle to explode. Just like blowing a balloon, the air pressure is too high, just like blowing a balloon, so it bursts.
Dr. Liu Min, a doctoral supervisor and a "thousand young people" from distinguished professor and the School of Physics and Electronics of Central South University, said that carbonated drinks are all soda water containing carbon dioxide. After shaking, carbon dioxide will be released, and the air pressure will continue to rise sharply. At this time, opening the bottle cap will make the gas squeeze out of this small mouth instantly and explode.
Dr. Liu Min said that if the iced coke is picked up as soon as it hits the ground, its temperature difference will not be too big, because the heat transfer of water will not be particularly fast. However, when the iced drink shakes after landing, it will release a lot of carbon dioxide gas, and the air pressure will rise sharply. He said that if the drink exploded without shaking when it was taken out of the refrigerator, it might be related to the temperature difference. If there is shaking, it is still related to air pressure.
Dr. Liu Min said that when iced coke explodes, it will generate 2 to 5 atmospheres, and 2 atmospheres is equivalent to 200 meters of water pressure on the body. These drinks are packed in bottles and jars. When they break, bottles and cans will also break. Just like a Grenade, its explosive lethality is not particularly great, but it contains fragments. After the explosion, the debris will be ejected at high speed, which is more lethal. Therefore, bursting bottles and cans may cut your hand.
Ma Mu, a physics teacher at Xiangtan University, said that for canned carbonated drinks, the carbon dioxide in frozen drinks will be released with the freezing of water, which makes the cans in a high pressure state. However, the pressure in the can is not big enough to make the coke can burst. First of all, the can itself will not be full in the manufacturing process; In addition, the bottom of the jar is concave, and if the pressure inside is really great, the concave part may be pushed out.