Stronger Melting Point
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Stronger Melting Point
Can anyone explain why Ionic bonds have a high melting point than covalent bonds? Is it because ionic bonds are stronger than covalent? If so what makes them stronger?
Thanks!
Thanks!
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Re: Stronger Melting Point
I believe ionic bonds are stronger than covalent bonds because they are two opposite charges attracted to one another. Since they are two opposite charges, the attraction is much stronger than the covalent bond formed between two molecules. This stronger attraction means it has a stronger electrostatic force holding them together, which makes it harder to break the bonds therefore giving ionic bonds the character of having a higher melting and boiling point.
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Re: Stronger Melting Point
Ionic bonds have a higher melting point than covalent bonds because they form an ionic lattice structure, which is a giant repeating structure of oppositely charged ions next to each other, and because of the greater electrostatic potential difference between the two atoms in the bond. An ionic bond exists because a negative charged anion is attracted to a positively charged cation. The electrostatic potential energy in this attraction is greater than the energy involved in a covalent bond where electrons are shared. Furthermore, ionic structure make up giant lattices where all of the oppositely charged ions are next to each other. To melt an ionic compound, you need to break apart this lattice structure, which involves overcoming the electrostatic potential. This is harder to do than melting covalent compounds because that just involves overcoming hydrogen bonding, dipole-dipole, or LDF forces.
Hope this helps!
Hope this helps!
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Re: Stronger Melting Point
The stronger the bond, the higher the melting point. Since ionic bonds are stronger than covalent bonds due to it being a bond between to atoms with opposite charges, the bond will be much stronger than a covalent bond, resulting in ionic compounds having higher melting points.
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Re: Stronger Melting Point
There's a bigger difference in energy in ionic bonds. More energy means a higher melting point.
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Re: Stronger Melting Point
I think you are totally correct. Strong bond strength contributes to a high melting point. I think since ionic bonds are formed between ions, and a cation and an anion have opposite charges. As a result, they attract each other, and the attraction is fairly strong, so ionic bonds are stronger than covalent bonds.
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Re: Stronger Melting Point
Ionic bonds are the highest energy bonds that we know of in this class up until now, so it would have a higher melting point.
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Re: Stronger Melting Point
Ionic and covalent bonds are both intramolecular forces. Ionic bonds are generally stronger than covalent bonds because ionic is between a positive and negative charge, so that charge to charge attraction is super strong. I am guessing this is why ionic bonds have a higher melting point than covalent bonds.
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Re: Stronger Melting Point
It depends on the case. Because the melting point is determined by the strength of the chemical bonds.
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Re: Stronger Melting Point
Ionic bonds are much stronger than any other force, which makes it more difficult to break apart, which in turn heightens the boiling point of the compound.
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Re: Stronger Melting Point
Ionic bonds are stronger than covalent bonds, they would require more energy to melt overall. More energy means that it takes more heat energy to break the bonds, therefore contributing to the higher melting point. This is why it's easier to melt sugar (covalently bonded molecule) than to melt table salt (ionically bonded compound). Ionic bonds are stronger because instead of sharing electrons like a covalent bond, the cation completely exchange electrons with the anion and the two are then attracted each other based on their positive/negative charges.
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Re: Stronger Melting Point
Ionic bonds are stronger than covalent bonds, because they are formed from stronger electrostatic interactions between ions compare to covalent bonds.
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