Vapor Pressure - Relation To Boiling Point of Liquids

Relation To Boiling Point of Liquids

Further information: Boiling point

As a general trend, vapor pressures of liquids at ambient temperatures increase with decreasing boiling points. This is illustrated in the vapor pressure chart (see right) that shows graphs of the vapor pressures versus temperatures for a variety of liquids.

For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart. It also has the lowest normal boiling point (-24.2 °C), which is where the vapor pressure curve of methyl chloride (the blue line) intersects the horizontal pressure line of one atmosphere (atm) of absolute vapor pressure.

Although the relation between vapor pressure and temperature is non-linear, the chart uses a logarithmic vertical axis to produce slightly curved lines, so one chart can graph many liquids. The vapor pressure of a liquid at its boiling point equals the pressure of its surrounding environment.

Read more about this topic:  Vapor Pressure

Famous quotes containing the words relation to, relation, boiling and/or point:

    “You see, I am alive, I am alive
    I stand in good relation to the earth
    I stand in good relation to the gods
    I stand in good relation to all that is beautiful
    I stand in good relation to the daughter of Tsen-tainte
    You see, I am alive, I am alive”
    —N. Scott Momaday (b. 1934)

    “The psychoanalysis of individual human beings, however, teaches us with quite special insistence that the god of each of them is formed in the likeness of his father, that his personal relation to God depends on his relation to his father in the flesh and oscillates and changes along with that relation, and that at bottom God is nothing other than an exalted father.”
    —Sigmund Freud (1856–1939)

    “O but we talked at large before
    The sixteen men were shot,
    But who can talk of give and take,
    What should be and what not
    While those dead men are loitering there
    To stir the boiling pot?”
    —William Butler Yeats (1865–1939)

    “The essence of being human is that one does not seek perfection, that one is sometimes willing to commit sins for the sake of loyalty, that one does not push asceticism to the point where it makes friendly intercourse impossible, and that one is prepared in the end to be defeated and broken up by life, which is the inevitable price of fastening one’s love upon other human individuals.”
    —George Orwell (1903–1950)