Respuesta :
Explanation:
Surface tension is defined as the attractive forces experienced by the surface molecules of a liquid by the molecules present beneath the surface layer of the liquid.
In a molecule, more is the number of hydroxyl groups present in it more will be the force of attraction faced by surface molecules towards the inner side of the liquid.
Hence, then the surface tension will increase.
Compoud (a) has only one -OH group, compound (b) has 3 -OH groups and compound (c) has 2 -OH groups.
Therefore, the given compounds are arranged on the basis of order of increasing surface tension at a given temperature are as follows.
[tex]CH_3CH_2CH_2OH[/tex] < [tex]HOCH_2CH_2OH[/tex] < [tex]HOCH_2CH(OH)CH_2OH[/tex]
The surface tension in the following molecules in the increasing order is given as, [tex]\rm CH_2CH_2CH_2OH < HOCH_2CH_2OH < HOCH_2CH(OH)CH_2OH[/tex].
What is surface tension?
Surface tension can be given as the force applied by the molecules underneath the liquid surface to form the attraction and made the liquid occupy, the least surface area.
The compounds with a more number of attracting groups such as hydroxyl radicals tend to apply more attraction and have more surface tension.
The number of hydroxyl groups in the following compounds are:
- [tex]\rm CH_3CH_2CH_2OH=1[/tex]
- [tex]\rm OHCH_2CH(OH)CH_2OH=3[/tex]
- [tex]\rm OHCH_2CH_2OH=2[/tex]
The increasing order of the surface tension in the following molecules is, [tex]\rm CH_2CH_2CH_2OH < HOCH_2CH_2OH < HOCH_2CH(OH)CH_2OH[/tex].
Learn more about surface tension, here:
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