Which of the two (hexane or heptane) liquids is volatile in pressure /composition diagram.
Hexane is more volatile than heptane in a pressure/composition diagram. This is because hexane has a lower boiling point and vapor pressure than heptane. As the pressure increases and the composition shifts towards the liquid phase, hexane will vaporize before heptane, making it the more volatile liquid in this scenario.
Which of the two (hexane or heptane) liquids is volatile in pressure /temperature composition diagram.
To determine which of the two liquids, hexane or heptane, is more volatile in a pressure/composition diagram, we need to compare their vapor pressure curves. The liquid with the higher vapor pressure at a given temperature is considered more volatile.
Hexane (C6H14) has a lower boiling point (-0.5°C) compared to heptane (C7H16) (98.4°C), indicating that hexane has a higher vapor pressure at a given temperature. This suggests that hexane is more volatile than heptane.
So, in a pressure/composition diagram, hexane would have a higher vapor pressure and would be considered more volatile compared to heptane.
To determine which of the two liquids, hexane or heptane, is more volatile in a pressure/composition diagram, you need to consider their boiling points and vapor pressure.
1. Determine the boiling points: Hexane has a boiling point of approximately 69°C, while heptane's boiling point is about 98°C. Boiling point is the temperature at which a liquid changes into vapor at a given pressure.
2. Consider vapor pressure: Vapor pressure is the pressure exerted by the vapor of a substance when it is in equilibrium with its liquid phase. It indicates how readily a substance evaporates. The higher the vapor pressure, the more volatile the liquid.
In this case, since hexane has a lower boiling point and a higher vapor pressure compared to heptane, it is more volatile. Hexane will evaporate more readily and have a higher vapor pressure at a given temperature and pressure.
Therefore, in a pressure/composition diagram, hexane would be the more volatile liquid compared to heptane.