The compounds Br2 and ICl have the same number of eletrons, yet Br2 melts -7.2 degrees C and ICl melts at 27.2degrees C. explain
2006-09-22 14:23:50 · 7 answers · asked by Lorenz 2 in Science & Mathematics ➔ Chemistry
Br2 is symmetric.
ICl has asymmetry. The Cl is more electronegative than the I. As a result, the molecule will be slightly negative on the Cl end and positive on th I end. This dipole moment creates cohesion, resulting in the higher melting point.
2006-09-22 14:35:27 · answer #1 · answered by novangelis 7 · 0⤊ 0⤋
ICl is not a pure substance. Any impurity when compared to a pure substance will melt slower and with a broader range. A pure compound has a sharp melting point with hardly any range.
Br2 is pure, therefore melts sharp & narrow.
2006-09-22 21:29:12 · answer #2 · answered by Emerson 5 · 0⤊ 0⤋
Ex. Ice melt when the inter molecular force is break and is free to move. The stronger the intermoleculare force the more energy that is need to melt this thing.
2006-09-22 21:28:42 · answer #3 · answered by palidinft91 1 · 0⤊ 0⤋
due to the electronegativity difference in ICl it 's bonding is stronger
2006-09-22 21:26:26 · answer #4 · answered by Franklin 3 · 0⤊ 0⤋
Novangelis gives the correct answer in short form and I am too lazy to reproduce the long answer in this forum.
2006-09-22 22:23:32 · answer #5 · answered by d/dx+d/dy+d/dz 6 · 0⤊ 0⤋
I would guess that those intermolecular forces that you mentioned and the non-linear dynamics of their outer shells may have a chaotic effect. Maybe?
2006-09-22 21:27:27 · answer #6 · answered by Ahab 5 · 0⤊ 0⤋
The answers given by "Franklin" and "Novangelis" make sense.
2006-09-22 21:35:33 · answer #7 · answered by Ren Hoek 5 · 0⤊ 0⤋