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Why do molecular substances with strong intermolecular forces have high melting points?
Wiki User
∙ 11y ago
There are two molecular network structures that result in high melting points. The covalent structure of carbon forms rigidity of diamond. A diamond can in fact boil but it requires an extreme temperature because of this structure. Salt (NaCl) has a rigid ionic lattice structure between its sodium and chloride atoms. This gives salt a melting point of some 801 degrees Celsius.
Wiki User
∙ 9y ago
Wiki User
∙ 13y agoThe bonding between the atoms goes on and on in three dimensions. Melting requires the separation of the species comprising the soild state, and boiling the separation of the species comprising the liquid state. Because of the large amount of energy needed to break huge numbers of covalent bonds, all giant covalent network structures have high melting points and boiling points and are insoluble in water.
Wiki User
∙ 11y agoWiki User
∙ 15y agoAll substances with a network structure have high melting points because of the large amounts of energy required to break down the network structure.
Wiki User
∙ 14y agoA substance with a network structure has a high melting point because it is more complex creating different things to melt through with chemical reactions.
Wiki User
∙ 13y agothe atoms within the solids are covalently bonded to four additional atoms.
Wiki User
∙ 9y agoNetwork solids have a high melting point because they are very compact. It takes a lot of energy to break these atoms apart.
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Why molecular substances with weak intermolecular forces have low melting points?
The cause is just this weak intermolecular force, ease to be broken.
Why do molecular substances with weak inter-molecular forces have low melting points?
The cause is just this weak intermolecular force, ease to be broken.
How melting and boiling points are affected by intermolecular forces?
The stronger the intermolecular forces, the higher the melting point and boiling point. The weaker the intermolecular forces, the lower the melting and boiling points are.
How does molecule size affect melting point?
Intermolecular forces increase as molecular size increases, thus the bigger the molecular size, the bigger the molecular mass, the stronger the intermolecular forces, the more energy required to break the bonds between the molecule, thus a higher melting/boling point.
Why do dipole forces have an impact on the melting and boiling points of substances?
Dipoles are a form of intermolecular force which holds molecules together. The greater the intermolecular force, usually the greater the boiling point, for example.
Why molecular substances with weak intermolecular forces have low melting points?
The cause is just this weak intermolecular force, ease to be broken.
Does the melting point depend on the substances being melted?
Yes, because the melting point depends on the strength of the intermolecular forces, which are different for different molecules and compounds. Stronger intermolecular forces mean a higher melting point.
Why do molecular substances with weak inter-molecular forces have low melting points?
The cause is just this weak intermolecular force, ease to be broken.
Which inter molecular force would cause the highest melting point?
Hydrogen bonding, which is the strongest of the intermolecular forces.
How melting and boiling points are affected by intermolecular forces?
The stronger the intermolecular forces, the higher the melting point and boiling point. The weaker the intermolecular forces, the lower the melting and boiling points are.
How does molecule size affect melting point?
Intermolecular forces increase as molecular size increases, thus the bigger the molecular size, the bigger the molecular mass, the stronger the intermolecular forces, the more energy required to break the bonds between the molecule, thus a higher melting/boling point.
How can the boiling and the melting point be used to help identify substances?
intermolecular forces are hard to overcome...apex
Why do substances made up of simple molecules have low points?
Substances made up of simple molecules have low melting points because there are strong bonds between the atoms in the molecule, but weak bonds holding the molecules together. Therefore, the intermolecular forces break fairly easily, due to the fact that they are weak and the covalent bonds making up the molecule do not break because they are strong. This means that, due to the weak intermolecular forces breaking down easily, simple molecular substances have low melting and boiling points.
How are the melting points of ionic compounds different from molecular compounds?
Very much higher.
What is an Inter molecular force?
Intermolecular forces are any forces exerted on neighboring molecules of a given compound. The forces are not the actual chemical bonds present in the substance, but rather the substances own attractiveness to its own molecules. These intermolecular forces play a crucial role in determining a compounds various physical properties such as but not limited to :solubility, melting point, boiling point, density.
Why do dipole forces have an impact on the melting and boiling points of substances?
Dipoles are a form of intermolecular force which holds molecules together. The greater the intermolecular force, usually the greater the boiling point, for example.
Why do oxygen and methane have low melting points?
The melting point of a substance depends, in part, on whether one or more intermolecular forces act to attract the molecules of the substance, and on the strengths of these forces. In the cases of the substances you mention these forces are absent or very small.
