What causes white smoke?

What causes white smoke? Analysis of hot topics on the Internet in the past 10 days

Recently, topics related to "white smoke" have sparked widespread discussion on multiple social platforms and news media. This article combines the popular content on the Internet in the past 10 days to give you a structured analysis of this phenomenon from the perspectives of scientific principles, common scenarios, social events, etc.

1. Statistics of “white smoke” hot spots across the entire network (last 10 days)

2. Three main causes of white smoke

1.water vapor condensation: Most common in low-temperature environments (such as during the recent cold wave in the north), when hot gas encounters cold air, water vapor quickly condenses to form white mist, which often appears in:

• power plant cooling tower
• winter car exhaust pipe
• Domestic water heater exhaust outlet

2.chemical reaction: In a recent incident at a chemical plant, ammonia gas leaked and reacted with air to form ammonium chloride particles, forming dense white smoke. Typical chemical white smoke includes:

3.Insufficient combustion: Many recent straw burning incidents have shown that incomplete combustion will produce white smoke, which is different from black smoke (carbon particles) and blue smoke (burning oil).

3. Typical recent hot events

1.Hebei factory incident on December 5: Local residents filmed white smoke continuing to emit from chimneys. After the environmental protection department intervened, it was confirmed to be water vapor emissions. The related video has been played more than 5 million times.

2.New energy vehicle white smoke controversy: A video of an electric vehicle battery overheating and smoking posted by a review blogger sparked discussion. It was later confirmed to be caused by the evaporation of coolant. The topic has been read 120 million times.

4. How to distinguish dangerous white smoke from normal phenomena

5. Expert advice

1. It is normal for a short period of white smoke to appear when preheating the vehicle in winter, but if it is accompanied by a decrease in power, the engine needs to be checked.

2. When you find continuous white smoke from an unknown source, you should keep a distance of at least 50 meters and call the police in time.

3. Environmental protection inspections have been carried out in many places recently, and companies that emit white smoke are required to provide environmental inspection reports.

In summary, the phenomenon of white smoke includes both completely harmless physical phenomena and may also involve safety hazards. Through the structured data analysis of this article, we hope to help the public understand this hot phenomenon more scientifically.