IMF 2 BOILING POINT (CHEESE) Flashcards
Electrostatic interactions between molecules
Intermolecular forces
Atoms within a molecule make what with each other?
Covalent and Ionic bonds
Large ionic solids are held by?
Ionic bonds
Ionic bonds are strong why?
They have formal charges
Covalent bonds in a water molecule are?
Polar
Why are water molecules polar?
Oxygen is more electronegative than hydrogen thus pulling electrons in the bonds towards itself
A molecule with one side that has excess electrons and another with little electrons
Dipole
The partially negative sides of a dipole is attracted to what?
Positive Charges
The partially positive sides of a dipole is attracted to what?
Negative Charges
When dipoles interact with each other
Dipole Dipole Interactins
When dipoles generated by NH3, H20, HF interact with each other
Hydrogen Bonds
N, O, F are strong bonds because?
They’re highly electronegative
Greater than partial charge? The greater the what?
Interaction
Greater the interaction, greater the what?
The partial charge
But partial charges are not stronger than?
Formally charged particles
Any substance can do this?
Van der Waals Forces
Only ions can make what?
Ion Ion Interactions
Only ions can make what?
Ion Ion Interactions
Covalent Molecules with a dipole can make what?
Dipole Dipole Interactions
This happens when one side of the atom is partially negative or positive
Momentary Dipole
When a momentary dipole approaches another atom it will generate what?
Induced dipole
The slight partial negativity repels to another atom meaning
The other atom has a slight dipole
Why is Ion Ion forces the strongest?
Involves formal charges
Involves formal charge and a partial charge
Ion Dipole
Involves only partial charges
Dipole Dipole
Involves induced dipoles
Van der Waals
In order for an element to have motion and in order for it to go from another phase of matter to another. What is needed?
Heat Energy
Energy left inside an element is what?
Is the needed heat energy in order for it to change phase
The stronger the forces between molecules; the more what is needed to melt or boil them.
Heat Energy
Which compound generates intermolecular forces? Is a question needed to be asked in order to know what?
Its boiling point
Nonpolar Covalent Bonds can only do what?
Van Der Waals
