Here's why this happens and how to approach the situation:
* Decomposition: When a substance decomposes, it breaks down into different, often less complex, molecules. This is irreversible under the conditions of distillation.
* Vapor Pressure and Boiling Point: Vapor pressure is the pressure exerted by the vapor of a liquid in equilibrium with its liquid phase. The boiling point is the temperature at which the vapor pressure equals the surrounding atmospheric pressure. Since the liquid decomposes at 80°C, its vapor pressure at that temperature is irrelevant because it won't be able to reach its boiling point.
Possible Solutions:
1. Reduce the Pressure: Lowering the pressure surrounding the liquid will decrease the temperature at which it boils. This is called vacuum distillation. If you can reduce the pressure enough, you might be able to distill the liquid at a temperature below its decomposition point.
2. Alternative Separation Techniques: Since distillation is not viable, you might need to consider other separation techniques, such as:
* Chromatography: This method separates components based on their differences in adsorption to a stationary phase.
* Crystallization: If the liquid can be crystallized, you could separate it from any decomposition products.
* Solvent Extraction: Using a suitable solvent, you might be able to selectively extract the desired component.
Important Note: The specific method you choose will depend on the properties of the liquid and its decomposition products. It's essential to research appropriate methods and safety procedures before attempting any separation techniques.
