i mostly heard that HBr is higher than HCl. in most chemistry books i had seen the same thing. i understand that it is not true. HCl should have higher boiling point than that of HBr?
2007-11-22 01:23:52 · 3 answers · asked by FAJI M 1 in Science & Mathematics ➔ Chemistry
The H-Cl bond is stronger than the H-Br bond.
2007-11-22 01:28:12 · answer #1 · answered by dlt 3 · 0⤊ 0⤋
This is because of Hydrogen bonding, which occurs between a H atom attached to electronegative elements (F, O, N, Cl) and a neighbouring electronegative element (F, O, N, Cl). This is because the shared electrons between H and the Cl atom are drawn more to Cl as it is more electronegative. Hence the neighbouring Cl atom has an attraction for the unusually bare proton (H atom). The attraction bonds the two molecules together. Hydrogen bonding is around 1/20 to 1/10 the strength of a covalent bond.
2007-11-22 09:30:07 · answer #2 · answered by sierra helene 2 · 0⤊ 0⤋
B P HCl, -84.2 C; HBr - 67.1
Are you confusing this with HF, + 19.5 (effect of hydrogen bonding)?
2007-11-22 09:29:52 · answer #3 · answered by Facts Matter 7 · 0⤊ 0⤋