Shape of Molecules affect boiling point?

Moderators: Chem_Mod, Chem_Admin

905385366
Posts: 54
Joined: Sat Jul 20, 2019 12:16 am

Shape of Molecules affect boiling point?

Postby 905385366 » Fri Nov 15, 2019 11:44 am

Why do rod-shaped molecules have a higher boiling point than spherical shapes molecules?

Brittney Hun 2C
Posts: 85
Joined: Wed Sep 11, 2019 12:15 am

Re: Shape of Molecules affect boiling point?

Postby Brittney Hun 2C » Fri Nov 15, 2019 11:46 am

The rod shaped molecule is larger than the spherical shaped molecule, thus experiencing greater intermolecular london dispersion forces. Larger molecules=stronger attraction=harder to break bonds=higher boiling point.

jisulee1C
Posts: 94
Joined: Thu Jul 25, 2019 12:17 am

Re: Shape of Molecules affect boiling point?

Postby jisulee1C » Fri Nov 15, 2019 12:14 pm

Also considering Van Der Waals forces it’s important to consider surface area. The larger the surface area the more forces there are. Because rod shaped has a larger surface area than spherical shape molecules it has more Van Der Waals forces and therefore will have a higher boiling point.

Kurtis Liang 3I
Posts: 50
Joined: Sat Aug 24, 2019 12:17 am

Re: Shape of Molecules affect boiling point?

Postby Kurtis Liang 3I » Fri Nov 15, 2019 12:22 pm

When two rod-shaped molecules come close together, there are more spots to experience London dispersion forces, so they will be more tightly attracted to each other, thus raising the boiling point.

Rory Simpson 2F
Posts: 86
Joined: Fri Aug 09, 2019 12:17 am

Re: Shape of Molecules affect boiling point?

Postby Rory Simpson 2F » Fri Nov 15, 2019 1:00 pm

Rod shaped molecules have a larger surface area that are close to each other, meaning that there is less distance between molecules and stronger interaction of Van Der Waal's forces. The stronger intermolecular forces causes an increase in the boiling point for rod-shaped molecules as compared to spherical ones which have less nearby surface area for interactions to occur.

805394719
Posts: 81
Joined: Wed Sep 11, 2019 12:16 am

Re: Shape of Molecules affect boiling point?

Postby 805394719 » Fri Nov 15, 2019 1:15 pm

Rod-shaped molecules have higher boiling points than spherical molecules because of the heightened interactions between the molecules. Boiling points depend on the strength of intermolecular forces. When a molecule is more linear as in the case of rod-shaped molecules, it will have a larger surface area for interactions to occur between molecules. A spherical molecule, in comparison, will have a smaller surface area available for interactions between molecules, so there will be fewer interaction between molecules which will result in a lower boiling point since it is easier to break the interactions between the molecules as there are fewer of them. A rod-shape, in contrast, will have a higher boiling point due to the fact that there are more interactions between the molecules.

Miriam Villarreal 1J
Posts: 87
Joined: Sat Aug 17, 2019 12:16 am

Re: Shape of Molecules affect boiling point?

Postby Miriam Villarreal 1J » Fri Nov 15, 2019 5:54 pm

The idea that molecular geometry affects boiling point involves the concept that the less complex the shape the easier it will be for molecules to move freely

Megan_1F
Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

Re: Shape of Molecules affect boiling point?

Postby Megan_1F » Fri Nov 15, 2019 9:41 pm

Boiling points depend on the strength of intermolecular forces. Thus, because rod shapes have more surface area, which means more area to have Van DerWaals forces between rod shaped molecules, it will have a higher boiling point.


Return to “Dipole Moments”

Who is online

Users browsing this forum: No registered users and 1 guest