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    lalewis's Avatar
    lalewis Posts: 1, Reputation: 1
    New Member

    Jul 10, 2010, 02:38 PM
    Is energy released or absorbed when water is changed from a gaseous to a liquid phase
    Is energy absorbed or released when water is changed from a gaseous to a liquid phase
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member

    Jul 17, 2010, 09:57 PM

    Say you have some water in a cup. What is the process of making it change from liquid to gaseous state called?

    Boiling right? And how do you boil it? By heating it right? This means, you supply heat, and it absorbs heat to boil, or evaporate.

    The reverse is true, that is, water loses energy when it condenses to form water again.

    Solid -> Liquid -> Gas

    Whenever you go from left to right, you are supplying energy, that is the substance absorbs energy.

    Solid <- Liquid <- Gas

    Whenever you go from right to left, the substance is releasing energy.

    If you know about intermolecular bonding, metallic bonding and covalent bonding, you should know that states of matter are related to these.

    In the solid state, the particles are held tightly held together so that they cannot move. This is why solids don't flow. The stronger the bonds, the more they'll remain as such.

    In the liquid state, the particles are held quite tightly together. The particles can move around, but there are still some bonds which prevent them from escaping from the whole lot of other particles.

    In the gas state, there is practically no bonding between the particles, such that they can get completely separated. The particles can now even 'fly' on their own.

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