Table of Contents
- 1 Why is the boiling point of water is the highest among the hydrides of the group 16 elements?
- 2 Which among the following has highest boiling point?
- 3 Why does the boiling point of Group 15 hydrides increase down the group?
- 4 Which among the following has the highest boiling point and why?
- 5 Why does H2O have a lower boiling point than H2Se?
Why is the boiling point of water is the highest among the hydrides of the group 16 elements?
Group 16 hydride molecules have a bent shape. Weaker intermolecular forces act between other Group 16 hydride molecules. The melting point and boiling point of water (H2O) molecules is unexpectedly high due to the stronger hydrogen bonds acting between water molecules.
Why does h20 have a higher boiling point than other Group 6 hydrides?
(1) The hydrogen bonding ability of H2O which increases the boiling point. The partial charges, induced by the higher electronegativity of oxygen, mean that the hydrogens and oxygens will be attracted to one another by coloumbic forces.
What causes water to have a higher boiling point?
Explanation: Water has an unusually high boiling point for a liquid. This is related to the intermolecular forces between water molecules; when a liquid has particularly large intermolecular forces, it will have a higher boiling point.
Which among the following has highest boiling point?
Therefore, 1-chloropentane has the highest boiling point.
Why does group 16 have a higher boiling point than Group 17?
Oxygen as a 1st row element, is far more electronegative than sulfur and tellurium, and the O−H is far more polar as a result. The resultant intermolecular hydrogen bonding between adjacent molecules accounts for the exceptionally high boiling point of water, compared to the lower Group VI hydrides.
Why does boiling point decrease down Group 6?
The 7A elements (Fluorine, Chlorine, Bromine, Iodine) make weakly polar hydrides, and correspondingly weaker Van der Waals forces and intermolecular attraction; therefore their boiling points are lower.
Why does the boiling point of Group 15 hydrides increase down the group?
With increase in the atomic radii, the size of hydrides also increases. With increase in the size, the extent of van der Waals forces also increase. With increase in van der Waals forces, the boiling point increases. Thus, when you move down the group 15, the boiling points of its hydrides will increase.
Why water has high boiling point than ammonia?
Water as a “perfect” example of hydrogen bonding + hydrogens and lone pairs so that every one of them can be involved in hydrogen bonding. This is why the boiling point of water is higher than that of ammonia or hydrogen fluoride.
Why does water have a higher boiling point than chloroform?
have relatively strong H-bonds as well as dispersion forces and dipole-dipole forces. CH3CH2OH has more electrons so has stronger dispersion forces and hence the higher boiling point.
Which among the following has the highest boiling point and why?
CH3−CH=CH2 III. (CH3)2CO. IV.
Why does water have a high boiling point?
Water has a high boiling point because its molecules are bound together by hydrogen bonding, which is a very strong intermolecular force. It takes more kinetic energy, or a higher temperature, to break the hydrogen bonding between water molecules, thus allowing them to escape as steam.
How do intermolecular forces affect the boiling point?
Stronger intermolecular forces require more energy to disrupt, thus resulting in a higher boiling point for that substance. Water molecules are held together by hydrogen bonding, which is a very strong intermolecular force. Each water molecule is polar because the oxygen has a partial negative charge,…
Why does H2O have a lower boiling point than H2Se?
However, H2Se is less polar than H2S which, in turn, is less polar than H2O. This would result in decreasing boiling points down the group. EDIT: Just checked Wikipedia. H2O is the only group 6 Hydride to form Hydrogen bonds despite there being other polar group 6 hydrides.
Why is the melting point of hydrogen sulfide higher than water?
Why is the melting point of water (0°C) higher than that of hydrogen sulphide (-83°C)? In short, because the intermolecular forces holding the molecules together in a rigid, solid structure are much weaker in hydrogen sulfide than in water.