Task 1: Intermolecular Force

Satisfactory Essays
TASK 1-activity 2-M1
The stronger an intermolecular force, the higher the boiling point of the substance will be. This is because more energy is required to break the intermolecular forces. The order of strength of intermolecular forces is;
Hydrogen bonding> permanent dipole-dipole interaction> Van der Waal’s force
Magnesium Oxide has a very high melting and boiling point of 2852 and 3600 respectively. Magnesium oxide is held toghether with ionic bonds, and therefore require a lot on energy to separate the ions, and due to the strong electrostatic force of attraction between the ions, it makes the magnesium oxide less soluble.
Calcium carbonate also known as limestone has a very high melting point of 1339˚C and boiling point due to strong
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The most electronegative elements are those highly reactive non-metallic elements (such as Oxygen, Fluorine, and Chlorine).
The Pauling Scale is used to calculate the relative electro negativity’s of different elements.
Permanent dipole-dipole interactions:
The partial charges on polar molecule attract opposite partial charges on another polar molecule and create a weak intermolecular forces called permanent dipole-dipole interactions. As a result; between the two polar molecules there will be van der waal’s forces and permanent dipole-dipole interactions.
For example hydrogen chloride, the chlorine within the HCl molecule is more electronegative than the hydrogen, and as a result the electron are attracted closer to the chlorine than the hydrogen atom. Between these hydrogen chloride molecules exist dipole-dipole interactions and as a result the dipoles can interact with each other and increase the boiling point.
Hydrogen bonds:
Is a strong dipole-dipole attraction between an electron deficient Hydrogen atom on one molecule and a lone pair of electrons on a highly electronegative atom of another molecule (such as Fluorine, Oxygen, and
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