Strength and Length of Bonds

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caseygilles 1E
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Joined: Fri Sep 28, 2018 12:18 am

Strength and Length of Bonds

Postby caseygilles 1E » Sun Nov 18, 2018 11:47 pm

So we learned in class that larger atoms that bond together have a larger bond length and thus a weaker bond, so why would I2 be a solid in its natural form and Br2 be a liquid when they are larger atoms bonding together and F2 and Cl2 are gases but are smaller bonds? Is this talking about intramolecular forces rather than intermolecular forces?

May Xiao 1H
Posts: 14
Joined: Fri Sep 28, 2018 12:18 am

Re: Strength and Length of Bonds

Postby May Xiao 1H » Sun Nov 18, 2018 11:53 pm

the state of matter always depends on the intermolecular forces. Just think about how the speed of the movement of the particles/ molecules make their state different, and you will realize it's talking about the bonds between molecules instead of the bonds between atoms.

Br2 is liquid under room temperature because Br is a large molecule and Br2 molecules have stronger dispersion forces when they interacting with one another, thus tend to stay in a liquid state.

Return to “Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)”

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