Problem: Which member of the following pairs has the larger London dispersion forces?SiH4 or GeH4?

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We are being asked to determine which among SiH4 or GeH4 has a larger London dispersion force.

Recall: The London dispersion force is the weakest intermolecular force

It is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. 

The dispersion force increases with increasing molar mass because molecules or atoms of a higher molar mass generally have more electrons dispersed over a greater volume.

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Problem Details

Which member of the following pairs has the larger London dispersion forces?

SiH4 or GeH4?

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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 concept. You can view video lessons to learn Intermolecular Forces. Or if you need more Intermolecular Forces practice, you can also practice Intermolecular Forces practice problems.

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Based on our data, we think this problem is relevant for Professor Morkowchuk's class at UVA.