The solidification of a substance requires heat release (transferring heat to the external environment to make it hot). The freezing point temperature is equal to the melting point of the substance. Freezing and melting points are unique to crystalline substances and are regarded as the characteristics of crystals. ) Examples in life:
1, animal oil solidified at room temperature (lard)
2. The water is frozen.
When the temperature drops, the melted sugar and chocolate solidify.
Drinks freeze into ice in the refrigerator.
Extended information about lard use:
Lard is sweet, slightly cold and non-toxic. Its primary function is to detoxify Mylabris, Radix Gentianae, Radix Gentianae, Radix Puerariae, sulfur poisoning and various hepatotoxicity.
China people generally use lard for two main purposes. One is cooking, especially for southerners. They think cooking with lard will make dishes more nutritious and fragrant. For example, in Fuzhou and other places in the south of China, lard is poured into vegetables or noodles and eaten directly.
The second is to make cakes, such as barbecued pork. According to statistics, China, which produces the most pork, also ranks first in the world in lard production. Factories located in Guangdong, Zhejiang, Fujian, Jiangsu and other places use scientific machines and methods to extract lard.
These export units are tons of lard production plants, which not only supply families in China, but also export to many countries outside China. In addition, people still generally use hot pot to cook fat pork to extract lard in China.
Baidu encyclopedia-lard
Baidu encyclopedia-solidification