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With a bigger size there are stronger London forces. London forces are also known as Dispersion forces and van der Waal forces. These forces become stronger as the size of the molecule increases.
Butane, C4H10, is a gas with a relative size of 58 and a boiling point of ~ -1 ºC. Octane, C8H18, is a liquid with a relative size of 114 and a boiling point of 125 ºC. The two molecules differ in size only but as octane is bigger it has a higher boiling point due to the dispersion forces.
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How can one determine the boiling point of a molecule?
The boiling point of a molecule can be determined by looking at its molecular structure and the intermolecular forces present. Molecules with stronger intermolecular forces, such as hydrogen bonding, tend to have higher boiling points. Additionally, the size and shape of the molecule can also affect its boiling point. Experimentally, the boiling point can be measured by heating the substance and recording the temperature at which it changes from a liquid to a gas.
Boiling point of polar molecule?
The boiling point of a polar molecule is typically higher than that of a nonpolar molecule of similar size because polar molecules have stronger intermolecular forces, such as dipole-dipole interactions and hydrogen bonding, which require more energy to break. These stronger intermolecular forces result in a higher boiling point for polar molecules.
Would you expect the boiling point of chlorine to be higher or lower than that of iodine?
I would expect the boiling point of chlorine to be lower than that of iodine. This is because chlorine is a smaller molecule with weaker London dispersion forces, while iodine is a larger molecule with stronger forces due to its larger size.
Which has a greater boiling point urea or glucose and why?
Urea has a higher boiling point than glucose because urea is a larger molecule with stronger intermolecular forces due to its ability to form hydrogen bonds. Glucose, on the other hand, is a smaller molecule that lacks hydrogen bonding sites, resulting in weaker intermolecular forces. This difference in molecular size and bonding interactions leads to urea having a higher boiling point.
What inter molecular force would affect the boiling point the least?
London dispersion forces would generally affect the boiling point the least among intermolecular forces. These forces are relatively weak and depend on the size of the molecules involved rather than their polarity. Hydrogen bonding, dipole-dipole interactions, and ion-dipole interactions are typically stronger and contribute more significantly to the boiling points of substances.
How can one determine the boiling point of a molecule?
The boiling point of a molecule can be determined by looking at its molecular structure and the intermolecular forces present. Molecules with stronger intermolecular forces, such as hydrogen bonding, tend to have higher boiling points. Additionally, the size and shape of the molecule can also affect its boiling point. Experimentally, the boiling point can be measured by heating the substance and recording the temperature at which it changes from a liquid to a gas.
Boiling point of polar molecule?
The boiling point of a polar molecule is typically higher than that of a nonpolar molecule of similar size because polar molecules have stronger intermolecular forces, such as dipole-dipole interactions and hydrogen bonding, which require more energy to break. These stronger intermolecular forces result in a higher boiling point for polar molecules.
Would you expect the boiling point of chlorine to be higher or lower than that of iodine?
I would expect the boiling point of chlorine to be lower than that of iodine. This is because chlorine is a smaller molecule with weaker London dispersion forces, while iodine is a larger molecule with stronger forces due to its larger size.
Which has a greater boiling point urea or glucose and why?
Urea has a higher boiling point than glucose because urea is a larger molecule with stronger intermolecular forces due to its ability to form hydrogen bonds. Glucose, on the other hand, is a smaller molecule that lacks hydrogen bonding sites, resulting in weaker intermolecular forces. This difference in molecular size and bonding interactions leads to urea having a higher boiling point.
How does molecule size change of ozone layer affect the earth?
Molecule size changes of the ozone. When it is being depleted the most.
What is the connection between the size of the molecules in crude oil and their condensing or boiling point's?
Smaller molecules have a lower boiling point, and larger molecules have a higher boiling point. Source: Learnt this in class today.
Can Filtration can be used to separate mixtures based on their boiling point?
It is not possible; filtration as a separating method is based on the difference between boiling points.
Define the four ways to separate a mixture?
by boiling point: distillation by molecule / particle size: electrophoresis/sieve/membrane by polarity or charge: chromatography/isoelectric focussing by specific gravity: centrifugatiuon
What inter molecular force would affect the boiling point the least?
London dispersion forces would generally affect the boiling point the least among intermolecular forces. These forces are relatively weak and depend on the size of the molecules involved rather than their polarity. Hydrogen bonding, dipole-dipole interactions, and ion-dipole interactions are typically stronger and contribute more significantly to the boiling points of substances.
How does the size of and number of atoms contained in a hydrocarbon affect its properties?
As the base number of carbon atoms in a simple hydrocarbon increases, the higher the potential energy contained in the compound. More complex hydrocarbons can also have shifting melting and boiling ranges.
Name some physical properties other than boiling point that are affected by the presence of hydrogen bonds?
color, size, shape, melting pint, boiling point
Does a large covalent molecule generally have a low boiling point?
Boiling point of a molecular substance depends on the intermolecular forces - forces that attracts a molecule to its neighbours of the same kind.For a covalent molecule, the possible intermolecular forces aredispersion forcesdipole-dipole bonding andhydrogen bondingAs the strength and magnitude of the intermolecular forces increase, the boiling point increases because it becomes increasingly difficult to break the bonds and requires more energy for the same.Since different types of intermolecular bonding are present, the answer to the question cannot be given in a single sentence.Analyzing all types:If, for large covalent molecules, the intermolecular forces increase, then the boiling point will increase.If only dispersion forces are present, then as the number of electrons increases (and consequently the mass), so will the dispersion forces. Therefore, boiling points will be higher.If only dipole-dipole bonding is present, then, as the molecule increases in size, the charge is dispersed in the molecule, strength of the polarity decreases and thus the intermolecular forces decreases. Therefore, boiling point decreases.If only hydrogen bonding were present, the strength of the bond will depend on the halogen atom with which hydrogen forms a bond. It does not depend on the mass/size of the molecule.However, dipole-dipole and hydrogen bonding can never exist in a substance on their own but with dispersion forces.Therefore, as the mass/size of a covalent molecule increases, the dispersion forces increase and will lead to a higher boiling point independent of hydrogen bonding and the decrease in dipole-dipole bonding will be compensated by an equal or higher increase in dispersion forces.Large covalent molecules do not have low boiling points (in comparison with small covalent molecules). But boiling point of covalent molecules, in general, is less than that of ionic molecules.
