First, the three major factors affecting the melting point of alcohol
The melting point of alcohol is influenced by its purity, pressure and temperature. Under normal pressure, the melting point of alcohol ranges from-1 14℃ to 78℃. But with the increase of pressure, the melting point of alcohol will decrease. For example, under high pressure, the melting point range of alcohol may be further reduced. In addition, the purity of alcohol will also affect its melting point. Generally speaking, the higher the purity of alcohol, the narrower its melting point range.
Second, the physical properties and melting point of alcohol
1, physical state change
Melting point is the temperature at which a substance changes from solid to liquid. For alcohol, when the temperature is lower than its melting point, it will remain solid; When the temperature is higher than its melting point, it will become liquid.
2, the relationship between alcohol and purity
The higher the purity of alcohol, the narrower the melting point range. This is because the interaction between high-purity alcohol molecules is stronger and it needs higher temperature to melt.
3. The relationship between alcohol and stress
Under high pressure, the melting point of alcohol will decrease. This is because pressure increases the compactness between molecules, thus reducing the melting point.
4. Practical application
Understanding the melting point of alcohol is of great significance to industrial production, daily life and scientific experiments. For example, in the medical field, the disinfection effect of alcohol is related to its melting point; In industrial production, suitable storage and transportation conditions can be selected according to the melting point range of alcohol.
Influence of molecular structure and pressure of alcohol on melting point
1, molecular structure of alcohol
Alcohol is an organic compound whose molecular structure contains carbon, hydrogen and oxygen. This molecular structure makes alcohol show different physical properties under certain conditions, including melting point range.
2. The influence of pressure on the melting point of alcohol
In the high pressure environment, the molecular structure of the substance will be compressed, resulting in the decrease of intermolecular distance and the enhancement of interaction. This enhancement makes it easier for alcohol molecules to overcome the mutual attraction between their internal molecules, thus reducing their melting point.