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Why does the presence of double bonds decrease the melting point?
Wiki User
∙ 15y ago
most likely because the forces keeping the atoms bonded gets weaker with each added bond and therefore it is easier for heat to separate the atoms. most likely because the forces keeping the atoms bonded gets weaker with each added bond and therefore it is easier for heat to separate the atoms.
--> Yes, but the reason is because the introduction of a double bond results in bends in the molecule which makes it harder to 'pack' these molecules into a low energy crystalline, solid state. Therefore, they more easily break out of the solid state and melt into liquids (= bonds generally end up in the 'cis' configuration). Note that although they have lower melting points than their respective counterparts, they have higher boiling points due to the polarity associated with the double bond.
Wiki User
∙ 15y ago
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How does melting point change as the number of carbon- carbon double bonds increase?
As the number of carbon-carbon double bonds increases, the melting point decreases.
Which is most reactive ethyne or benzene?
An alkene is more reactive than alkyne. as double bond can donate pair of electron. while in tripple bond the bond length is less than double bond. Alkkynes have more attractive forces than alkene. so alkene is more reactive.
What is a result of intermolecular forces out of covalent bonds hydrogen bonds electronegativity double bonds?
hydrogen bonds
Which type of compound would have the lowest melting point?
Compounds bonded by covalent bonds do not necessarily have low melting points. Some have whereas some don't have.Some polymers and hydrocarbons have very high melting points. But it can be said that they don't have melting points as high as ionic compounds. It is so because ionic bonds are stronger than the covalent bonds.
A fat with no carbon-carbon double bonds that is usually solid at room temperature is said to be a?
Saturated fat. Double bonds = unsaturated One double carbon-carbon bond would be monounsaturated. Many double carbon-carbon bonds would be polyunsaturated.
How does melting point change as the number of carbon- carbon double bonds increase?
As the number of carbon-carbon double bonds increases, the melting point decreases.
What must become weaker for the melting point to decrease down the group?
The bonds between the electrons
Are double bonds beneficial to cells?
Double bonds are not beneficial to cells because they are more oxidised than a saturated compound so their free energy is less than that of a saturated compounds.Even the presence of double bond in a highly reduced compound like free fatty acids has a drawback since it creates a kink in the long hydrophobic chain of fatty acids which destabilize their structure and lowers the melting point
Effect of double bond in fatty acids to its melting point?
double bonds mean the fatty acid is unsaturated and kinky which makes its packing difficult in the phospholipid bilayer and hence this drop the melting point
How does the presence of cis double bonds in fatty acids affect membrane fluidity?
They tend to increase the fluidity
What are the bonds between molecules for melting chocolate?
Covalent bonds
What type of triglyceride what is the difference between a saturated and unsaturated triglyceride?
Saturated means that there are no double bonds and each carbon is "saturated" with hydrogens. Unsaturated indicates the presence of double bonds and by definition an extra bond between carbons means fewer bonds are available to hydrogen.
Name some physical properties other than boiling point that are affected by the presence of hydrogen bonds?
color, size, shape, melting pint, boiling point
Is melting point a periodic property?
A melting point is a periodic property. Melting point is basically the amount of energy required to break chemical bonds. The more energy required, the stronger the bonds and the higher the melting point. For example, Since Ionic bonds have a transfer of electrons, it requires a lot of energy to break the bonds and has a higher melting point.
What determines whether a carbon atom's covalent bonds to other atoms are in a tetrahedral configuration or a planar configuration?
the presence or absence of double bonds between the carbon atom and other atoms
Why do simple covalent bonds have low melting and boiling point?
It's due to the facts that simple covalent bonds like single bonds are weaker and longer than others bonds with tighter interactions like pi bonds (double bonds) or ionic bonds. Once the heat is turned up it excites the electrons to move from their bonded positions and the bond breaks
What is meant by the term unsaturated?
it simply means presence of a double bond more clearly:An unsaturated hydrocarbon has fewer than the maximum possible number of hydrocarbons, due to the presence of carbon-carbon double bonds at some point in the chain. (Since a carbon can only have 4 bonds total, a double bond uses 2 instead of 1, reducing the bonds available to hold hydrogen atoms.) Unsaturated hydrocarbons can have only one double bond (mono-unsaturated) or can have many
