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- What is the difference between vapour and gas?
Vapor implies the existence of a condensed phase that is the source or destination of the gas, or with which the gas may be in equilibrium; while gas does not make such an assumption
- Why vapor pressure is unaffected by change in atmospheric pressure
By definition vapor pressure seems the pressure of vapor ABOVE the liquid which is in equilibrium with liquid and how the hell we are applying the concept of vapor pressure in open container while discussing boiling?
- physical chemistry - What is the differences between partial pressure . . .
Vapor pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system
- physical chemistry - Why is octane more volatile than water while . . .
14 Octane has a boiling point of 120 °C Water has a boiling point of 100 °C The definition of boiling point is, "the temperature which the liquid substance's saturated vapor pressure equals the atmospheric pressure" Volatile substances have higher saturated vapor pressure at a given temperature, than the lesser volatile substances
- thermodynamics - Why do we have water vapor at room temperature and . . .
1 Think of molecules of water liquid escaping into vapor, and molecules of water vapor condensing into liquid Both processes occur simultaneously, and an equilibrium is reached in a closed system The molecules in vapor form create a specific vapor pressure at a given temperature, as explained by the kinetic theory of gases
- boiling point - Phases in equilibrium and not in equilibrium . . .
Water vapor exists below boiling point, and boiling just happens to be a point when water vapor can exist as bubbles in a liquid For question 2, Why are the phase separation lines called equilibrium lines? As you said, is the water vapor not always in equilibrium with the liquid even outside of the phase separation lines?
- Vapor Pressure and Boiling Point - Chemistry Stack Exchange
2 When a substance's multiple phases are in thermodynamic equilibrium with each other the vapor pressure is the pressure exerted by a vapor existing above a liquid surface Vapor pressure is related to volatility; the greater the pressure above the liquid the easier it is for vapor molecules to escape the equilibrium and transition to the gas
- whats the difference between gas and vapour? [duplicate]
A vapor is a gas in possible equilibrium with its liquid [or solid] at a temperature below its critical T and either in contact with the liquid or at the equilibrium vapor pressure If not at a sufficient pressure to condense and not in contact with the liquid the vapor behaves as a gas [nonideal] and the term becomes colloquial
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