Energy and Bonding (Grade 11 NSC Matric Physical Sciences): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Energy change as atoms approach to form bond
Energy change as atoms approach to form bond
Decreases (more negative) due to attractive forces
What min. point on energy diagram represents
What min. point on energy diagram represents
Most stable arrangement; forces balanced
Bond length definition
Bond length definition
Distance between nuclei of two bonded atoms
Bond length in terms of forces
Bond length in terms of forces
Equilibrium where attractive & repulsive forces balance
Units for bond length
Units for bond length
Nanometres (nm) or picometres (pm)
Bond energy definition
Bond energy definition
Energy required to break a chemical bond
Units for bond energy
Units for bond energy
Kilojoules per mole (kJ/mol)
Relationship: bond length & bond strength
Relationship: bond length & bond strength
Shorter bonds are generally stronger
Energy change: forming vs breaking bonds
Energy change: forming vs breaking bonds
Forming releases energy; breaking requires energy
Factors determining molecular polarity
Factors determining molecular polarity
Bond polarity AND molecular geometry