CHEMISTRY QUESTION!
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1g of liquid water and 1 g of steam contain the same number of molecules. Explain why the volume of the steam is much greater than that of the water.
Does this have something to do with steam having no fixed volume and liquid having a fixed volume? With no fixed volume, it means that the steam(gas) can be compressed when pressure is applied. However, liquid always has the same amount of volume.
Kindly justify your answer with explanation. Thanks. -
it is due to the strength of the attractive forces between steam and liquid water. Imagine steam molecules behaving like air molecules.Originally posted by bonkysleuth:1g of liquid water and 1 g of steam contain the same number of molecules. Explain why the volume of the steam is much greater than that of the water.
Does this have something to do with steam having no fixed volume and liquid having a fixed volume? With no fixed volume, it means that the steam(gas) can be compressed when pressure is applied. However, liquid always has the same amount of volume.
Kindly justify your answer with explanation. Thanks. -
maybe can use mole concept to explain?
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Because at higher temperatures, ie steam, the extra heat allows the molecules to be able to overcome the hydrogen bonds between the molecules better.Originally posted by bonkysleuth:1g of liquid water and 1 g of steam contain the same number of molecules. Explain why the volume of the steam is much greater than that of the water.
Does this have something to do with steam having no fixed volume and liquid having a fixed volume? With no fixed volume, it means that the steam(gas) can be compressed when pressure is applied. However, liquid always has the same amount of volume.
Kindly justify your answer with explanation. Thanks.
Hence water is denser. And yes, it also explains the volume discrepancy. -
Assuming normal atmospheric pressure, at higher temperature, the heat supplied to the system will disturb the intermolecular forces of the molecule (breaking H-bonds among water molecules). Thus, the molecules are farther apart, occupying larger volume.
The intermolecular forces in liquid is far stronger than those in gaseous state. Stronger intermolecular forces -> stronger attraction among molecules -> molecules are closer to one another -> occupying smaller volume. -
PV=nRT
pressure low, volume high -
Endothermic reaction?
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Extensive hydrogen bonding in water causes it to have a higher density than steam.
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how come sound more like physics question to me
Under kinetic theory of molecules I think