What is the boiling point of cyclohexane at 620 mmHg?

Cyclohexane at 620 mmHg boiling point is what?

In the chemical industry, boiling point is a very important physical property, which is usually used to measure the volatility and evaporation characteristics of liquids. As an important organic solvent, cyclohexane is widely used in chemical synthesis, dissolution and extraction. The boiling point of cyclohexane is affected by the external pressure, so understanding its boiling point change at different pressures is essential for industrial applications. This article will explore "what is the boiling point of cyclohexane at 620 mmHg" and analyze the factors that affect its boiling point.

Boiling Point and Pressure Relation

The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure at a given pressure. The boiling point of cyclohexane at standard atmospheric pressure is 80.7°C. However, with the change of external pressure, the boiling point will also change accordingly. At 620mm Hg (about 0.82 atm), the boiling point of cyclohexane will be lower than the boiling point of its regular. A decrease in the gas pressure causes the liquid molecules to escape more easily into the gas phase, so the boiling point decreases.

Calculation of the boiling point of cyclohexane at 620 mmHg

According to the Clausius-Clapeyron equation, the boiling point of a liquid at different air pressures can be estimated. This equation shows that there is an exponential relationship between the boiling point and the vapor pressure at different gas pressures. Using the experimental data and this equation, it can be deduced that the boiling point of cyclohexane at 620 mmHg is around 70°C. This means that the boiling point of cyclohexane decreases significantly when the external pressure decreases.

Effect of Vapor Pressure on the Boiling Point of Cyclohexane

The vapor pressure of cyclohexane is the rate of evaporation of its liquid at a specific temperature. When the gas pressure is 620 mmHg, the vapor pressure of cyclohexane will be close to the outside pressure, at which point it begins to boil. Due to the close relationship between vapor pressure and temperature, the vapor pressure of cyclohexane reaches the external pressure earlier at relatively low pressure, resulting in a drop in boiling point. This is a very important consideration when designing distillation equipment in chemical engineering.

Conclusion

By discussing the question "what is the boiling point of cyclohexane at 620 mmHg", we can conclude that the boiling point of cyclohexane at 620 mmHg is about 70°C. Understanding how boiling point varies with pressure is essential for chemical production, solvent recovery, and other engineering applications. In practice, precise control of ambient air pressure and temperature is critical to ensure product quality and production efficiency.