Problem: Compare the viscosity of neopentane, (CH3)4C, and n-pentane.

🤓 Based on our data, we think this question is relevant for Professor Heyes' class at UARK.

FREE Expert Solution

Recall: Viscosity is the resistance of a fluid to flow. Generally, viscosity increases with:

– decreasing temperature
– increasing molar mass
– stronger intermolecular forces

Neopentane and n-pentane are isomers, compounds with the same molecular formula but different structure. They both have the same molecular formula, C5H12. This means we can ignore their molar mass when comparing viscosity.

View Complete Written Solution
Problem Details

Compare the viscosity of neopentane, (CH3)4C, and n-pentane.

A model shows n-Pentane (C5H12), which is a linear chain of carbon and hydrogen. Its boiling point is 309.4 Kelvin. Linear molecules have larger surface area that enhances intermolecular contact and increases dispersion force.Neopentane has the same structural formula has n-Pentane (C5H12), but it has a spherical shape and a lower boiling point (282.7 Kelvin). In spherical molecules, smaller surface area diminishes intermolecular contact and decreases dispersion force.


Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intermolecular Forces and Physical Properties concept. If you need more Intermolecular Forces and Physical Properties practice, you can also practice Intermolecular Forces and Physical Properties practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Heyes' class at UARK.