effects of hydrogen bonding on melting point

The experiment illustrated in figure shows the effect of pressure on the melting point of ice. A thin copper wire passes round a large block of ice and two weights are attached to the free ends of the wire. The pressure of the wire lowers the melting po..

Hydrogen bonding has important effect on many physical properties of compounds, described bel..

The compounds containing hydrogen bonds have high melting and boiling points. Due to hydrogen bonding, the intermolecular force of attraction in the compound becomes large. Consequently, larger energy is required in separating these molec..

All alkali metals are soft and have low melting and boiling points. As alkali metals have only one valence electron per metal atom, the energy binding the atoms in the crystal lattice of the metal is low. Consequently, the metallic bonds in these metals are not very s..

>As a result of tetrahedral arrangement of H 2 O molecules in the solid state, the ice structure extends in three dimensions. Further the molecules of H 2 O are not packed closely as hydrogen bonds between oxygen and H atoms are ..

When common salt is added to crushed ice to make a freezing mixture the temperature is lowered below 0 o C. This is because ice absorbs heat from salt which is at a higher temperature and some ice melts dissolving some salt in it. This process continues till all the salt is dissolved or ..

The melting and boiling points of group 14 elements are much higher as compared to those of group 13 elements. Explanation: It is because the atoms of group 14 can form four covalent bonds with each other and, therefore, there are strong binding forces between their at..

Metals have metallic bond strengths, which is intermediate to that of covalent and ionic bonds. Therefore in general, metals have boiling and melting points in between to that of covalent and ionic compound..

The melting and boiling points of alkynes increase with molecular mass. Melting boiling points of some alkynes are, Ethyne/acetylene (CH CH), - 83 o C or 190 K Propyne (CH 3 -C CH), - 27 o C or 246 K 1 - Butane (CH 3 -CH 2 -C CH), 8 o C or 281..

This bond is formed between the hydrogen atom and an atom of the electronegative element (F,O,N) , of the same molecule . Intramolecular hydrogen bond results in the cyclization of the molecules and prevents their association. Consequently, the effect..