Arrange the following compounds in order of increasing viscosity: Propanol, CH3CH2CH2OH; Propanediol, CH3CH(OH)CH2OH; Propanetriol , HOCH@CH(OH)CH2OH
As the molecules tend to become more viscous the more OH groups then I would put the order of increasing viscosity as
Propanol,
Propanediol,
Propanetriol,
3,2,1
Viscosity is a measure of a liquid's resistance to flow. Generally, compounds with larger and more complex molecules tend to have higher viscosities.
Based on the molecular structures, the compounds can be arranged in increasing order of their molecular complexity as follows:
1. Propanol, CH3CH2CH2OH
2. Propanediol, CH3CH(OH)CH2OH
3. Propanetriol, HOCH2CH(OH)CH2OH
Therefore, the compounds can be arranged in increasing order of viscosity as:
Propanol < Propanediol < Propanetriol.
To arrange the compounds in order of increasing viscosity, we need to consider the molecular structure and intermolecular forces of the compounds.
Viscosity is generally a measure of a liquid's resistance to flow. It is determined by the strength and extent of intermolecular attractions in the liquid. The stronger these attractions are, the more viscous the liquid will be.
In this case, we have three compounds: propanol (CH3CH2CH2OH), propanediol (CH3CH(OH)CH2OH), and propanetriol (HOCH2CH(OH)CH2OH).
First, let's look at propanol. It has a linear structure with only one hydroxyl group (OH) attached to the central carbon atom. The presence of a single hydroxyl group allows for some intermolecular hydrogen bonding, which contributes to the viscosity of the compound.
Next, we have propanediol, which has two hydroxyl groups. The presence of two hydroxyl groups means that there will be more opportunities for intermolecular hydrogen bonding. As a result, propanediol is generally more viscous than propanol.
Lastly, we have propanetriol, which has three hydroxyl groups. The additional hydroxyl group in propanetriol provides even more opportunities for intermolecular hydrogen bonding. Therefore, propanetriol will typically have the highest viscosity among these three compounds.
Considering this information, we can arrange the compounds in order of increasing viscosity as follows:
Propanol (CH3CH2CH2OH) < Propanediol (CH3CH(OH)CH2OH) < Propanetriol (HOCH2CH(OH)CH2OH)