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Why do compounds with strong intermolecular attractive forces have higher boiling points than compounds with weak intermolecular attractive forces?
Wiki User
∙ 9y ago
Heat is simply an expression of how fast molecules are vibrating and moving about, for the purposes of state of matter. Intermolecular bonds are what stop this motion from happening, so the stronger this bond, the higher the temperature needs to be for the compound to melt or boil.
Wiki User
∙ 9y ago
Compounds with strong intermolecular forces require more energy to break the bonds between molecules and transition to the gas phase, resulting in higher boiling points. Conversely, compounds with weak intermolecular forces have lower boiling points because less energy is needed to overcome these forces and transition to the gas phase.
Wiki User
∙ 15y agoThe strong intermolecular forces reduced the tendency of evaporation of a liquid therefore high amount of heat is required to equalise the vapour pressure to atmospheric pressure, which is requirement for boiling so such liquids have high boiling points.
Wiki User
∙ 12y agoThe stronger the intermolecular forces, the higher the boiling point. This occurs because energy must first go into breaking the intermolecular bonds. Once these bonds are broken, the molecules can then gain enough energy to break free of the liquid phase.
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What can you say about the relative strength of the intermolecular forces in the two compounds?
The relative strength of intermolecular forces depends on the types of molecules involved. Compounds with hydrogen bonding, such as water, tend to have stronger intermolecular forces compared to those with only London dispersion forces, like diethyl ether. This results in higher boiling points for compounds with stronger intermolecular forces.
How melting and boiling points are affected by intermolecular forces?
Melting and boiling points are higher when intermolecular forces (such as hydrogen bonding, dipole-dipole interactions, or London dispersion forces) are stronger. These forces hold molecules together, so more energy is required to overcome them and change the state of the substance. Conversely, weaker intermolecular forces result in lower melting and boiling points.
Why do the melting and boiling points of a particular subsatnce vary?
The melting and boiling points of a substance vary due to differences in the strength and type of intermolecular forces present in the substance. Compounds with stronger intermolecular forces have higher melting and boiling points, while compounds with weaker forces have lower melting and boiling points. Additionally, factors such as molecular size and shape can also influence the melting and boiling points of a substance.
Do covalent compounds have lower boiling point than ionic compounds?
In general, covalent compounds have lower boiling points than ionic compounds. This is because covalent compounds have weaker intermolecular forces compared to the strong electrostatic forces between ions in ionic compounds. As a result, less energy is required to overcome the intermolecular forces in covalent compounds, leading to lower boiling points.
What causes the differences in melting points and boiling points between ionic and covalent compounds molecular substances?
The differences in melting and boiling points between ionic and covalent compounds are due to the strength of the intermolecular forces present. Ionic compounds have strong electrostatic forces of attraction between oppositely charged ions, resulting in higher melting and boiling points. Covalent compounds have weaker intermolecular forces such as London dispersion forces or dipole-dipole interactions, leading to lower melting and boiling points compared to ionic compounds.
What can you say about the relative strength of the intermolecular forces in the two compounds?
The relative strength of intermolecular forces depends on the types of molecules involved. Compounds with hydrogen bonding, such as water, tend to have stronger intermolecular forces compared to those with only London dispersion forces, like diethyl ether. This results in higher boiling points for compounds with stronger intermolecular forces.
How melting and boiling points are affected by intermolecular forces?
Melting and boiling points are higher when intermolecular forces (such as hydrogen bonding, dipole-dipole interactions, or London dispersion forces) are stronger. These forces hold molecules together, so more energy is required to overcome them and change the state of the substance. Conversely, weaker intermolecular forces result in lower melting and boiling points.
Why do the melting and boiling points of a particular subsatnce vary?
The melting and boiling points of a substance vary due to differences in the strength and type of intermolecular forces present in the substance. Compounds with stronger intermolecular forces have higher melting and boiling points, while compounds with weaker forces have lower melting and boiling points. Additionally, factors such as molecular size and shape can also influence the melting and boiling points of a substance.
Do covalent compounds have lower boiling point than ionic compounds?
In general, covalent compounds have lower boiling points than ionic compounds. This is because covalent compounds have weaker intermolecular forces compared to the strong electrostatic forces between ions in ionic compounds. As a result, less energy is required to overcome the intermolecular forces in covalent compounds, leading to lower boiling points.
What causes the differences in melting points and boiling points between ionic and covalent compounds molecular substances?
The differences in melting and boiling points between ionic and covalent compounds are due to the strength of the intermolecular forces present. Ionic compounds have strong electrostatic forces of attraction between oppositely charged ions, resulting in higher melting and boiling points. Covalent compounds have weaker intermolecular forces such as London dispersion forces or dipole-dipole interactions, leading to lower melting and boiling points compared to ionic compounds.
How are the melting points of ionic compounds different from molecular compounds?
Very much higher.
How is high melting and boiling points related to the structure of the compounds?
The structure of a compound will dictate what intermolecular forces hold the molecules together. The stronger these forces, the higher will be the boiling point.
What is the relationship between the strength of the intermolecular forces and boiling point?
The strength of intermolecular forces is directly related to the boiling point of a substance. Substances with stronger intermolecular forces require more energy to break those forces, leading to a higher boiling point. Conversely, substances with weaker intermolecular forces have lower boiling points.
What experimental property directly correlates with the strength of the intermolecular forces?
The boiling point of a substance is directly correlated with the strength of intermolecular forces. Substances with stronger intermolecular forces require more energy to overcome these forces, leading to higher boiling points. Conversely, substances with weaker intermolecular forces have lower boiling points.
Which have higher boiling points organic or inorganic compounds?
In general, organic compounds tend to have lower boiling points compared to inorganic compounds. This is because organic compounds are typically made up of lighter elements like carbon, hydrogen, and oxygen, which have weaker intermolecular forces. Inorganic compounds often contain heavier elements with stronger intermolecular forces, leading to higher boiling points.
Do ionic compounds or covalent compounds have stronger intermolecular forces?
Ionic compounds generally have stronger intermolecular forces compared to covalent compounds. In ionic compounds, the electrostatic attraction between ions of opposite charges is stronger than the intermolecular forces present in covalent compounds. This leads to higher melting and boiling points in ionic compounds compared to covalent compounds.
Do gases have a low boiling point?
Gases have a low boiling point because they have weak intermolecular forces that allow them to easily overcome attractive forces and transition to the gaseous phase at relatively low temperatures.
