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Covalent bonds
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∙ 11y ago
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Substance changes from solid to liquid?
This physical phenomenon (a change of phase) is called melting; during melting the chemical nature of molecules is not changed but the bonds between molecules are weakened.
Why does organic compound have low melting point?
They usually are long "chains" of hydrocarbon that only attracted to the weakest intermolecular bonds. Bonds between molecules are generally weaker so they tend to melt faster when compare to the melting point of stronger intermolecular bonded molecules.
What kind of solid tends to have the lowest melting points?
Molecular compounds tend to have the lowest melting points.
Which type of molecules would have the lowest melting point?
Covalent molecules which contain only bonds between elements of similar electronegativity. For example: Carbon and hydrogen. They must not contain polar bonds like Oxygen and hydrogen.
Do non polar molecules have high melting points?
No, It is infact polar molecules that have higher melting points than non-polar molecules. Polar molecules have stronger intermolecular bonds called dipole-dipole forces. These forces are an attraction between the slightly positive end of one molecule with the slightly nehative end of another.
Which intermolecular force affects melting point the most?
These are the hydrogen bonds between molecules.
Substance changes from solid to liquid?
This physical phenomenon (a change of phase) is called melting; during melting the chemical nature of molecules is not changed but the bonds between molecules are weakened.
Why does organic compound have low melting point?
They usually are long "chains" of hydrocarbon that only attracted to the weakest intermolecular bonds. Bonds between molecules are generally weaker so they tend to melt faster when compare to the melting point of stronger intermolecular bonded molecules.
How does water change from solid ice to liquid?
Melting. During melting, the hydrogen bonds between water molecules are broken thus causing the state to change from the solid to the liquid state where there are LESS (and not no) hydrogen bonds.
What bonded molecules have the lowest melting point?
Covalent molecules which contain only bonds between elements of similar electronegativity. For example: Carbon and hydrogen. They must not contain polar bonds like Oxygen and hydrogen.
When a substance is raised to its melting teperature what happens to the atom or molecules?
The inter-molecular bonds between the atoms/molecules are broken, releasing the atoms/molecules from a ridged structure to a freely moving mass.
Why do different liquids freeze at different times?
the molecules for different liquids are structured differently, and the time and energy it takes to form bonds and break bonds between adjacent molecules determines the freezing and melting points for various liquids.
What kind of solid tends to have the lowest melting points?
Molecular compounds tend to have the lowest melting points.
How do bonds form between water molecules?
The bond between water molecules is known as a hydrogen bond.
What characteristics does table salt have that is useful for melting ice?
Salt is hydrophyllic, so it wants to bond with water molecules. (A hydrophobic substance, such as oil, will not bond with water.) The bonds made between water and salt are stronger than the Hydrogen bonds made between water molecules, causing the bonds between the H20 to break. The breaking of the bonds releases energy which is in the form of heat and further melts the ice.
Which type of molecules would have the lowest melting point?
Covalent molecules which contain only bonds between elements of similar electronegativity. For example: Carbon and hydrogen. They must not contain polar bonds like Oxygen and hydrogen.
What takes away water molecules as molecules are combined?
The intermolecular bonds between water molecules are hydrogen bonds.
