Why does water have high boiling and melting point?

Water molecules in liquid state have the ability to form hydrogen bonds with each other. These hydrogen bonds are some of the strongest of all intermolecular forces, so a large amount of energy is needed to break these interactions − this is the main reason why water has such a high relative boiling point.

Why does water have high boiling and melting point compared to other molecules of the same molecular weight?

First there is molecular size. Large molecules have more electrons and nuclei that create van der Waals attractive forces, so their compounds usually have higher boiling points than similar compounds made up of smaller molecules. The attractive forces between the latter group are generally greater.

Why water has a high melting point?

H2O has very strong intermolecular forces due to the hydrogen bonds that a formed within the compound. Usually this would mean the compound has a very high melting point as a large amount of heat energy is required to overcome the forces, however H2O has a melting point of only O degrees.

Why does water have high boiling and high melting point as compared to h2s?

Complete answer: Water shows higher boiling point as compared to hydrogen sulphide due to the presence of hydrogen bonding between \[O\] and \[H\] in water molecules due to high electronegativity and small size of oxygen atom.

Which reason explains why the boiling point of water is higher than the boiling point of hydrogen sulfide?

Between water and hydrogen sulfide, both are polar, and have dipole-dipole forces, so they have higher boiling points than methane or silane. But water has hydrogen bonds, which are extra-strong dipole-dipole forces. Water boils much hotter than hydrogen sulfide.

What Does water have a high boiling point?

212°F (100°C)
Water/Boiling point

Why does water have a high boiling point Class 11?

Now, the high boiling point of water is due to the presence of Hydrogen bond. Multiple hydrogen bonds occur simultaneously in water because of its bent shape and the presence of two hydrogen atoms.

Why does water have a higher boiling point than H2Se?

H2O molecules undergo hydrogen bonding. On the other hand, H2Se and H2Te contain hydrogens that are not attached to electronegative elements, so they cannot undergo hydrogen bonding, and they possess boiling points that are significantly lower than water.

Why is the boiling point of water so much higher than that of the other hydrogen compounds of group VI of the periodic table?

Water as a “perfect” example of hydrogen bonding There are exactly the right numbers of δ+ 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 is cohesion and adhesion important?

Cohesive and adhesive forces are important for the transport of water from the roots to the leaves in plants. This pull results from the tendency of water molecules being evaporated on the surface of the plant to stay connected to water molecules below them, and so they are pulled along.

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 bonds affect the boiling point of water?

This network of intermolecular bonds leads to a much higher melting & boiling point for water than would be expected (compared to other molecules with no O-H bonds) – it can also be observed in other compounds (such as the bifluoride ion [HF2]-,

Why does water have a low melting point at room temperature?

Water molecules are attached to each other by hydogen bonds which is slightly stronger than van dar Waals force; therefore, it is liquid at room temperature. Still it required very low energy to eliminate the H-bond energy compared with the ionic bonds. Therefore, its melting point is comparatively lower.

Why is the melting point of H2O so high?

H2O has very strong intermolecular forces due to the hydrogen bonds that a formed within the compound. Usually this would mean the compound has a very high melting point as a large amount of heat energy is required to overcome the forces, however H2O has a melting point of only O degrees.