bond energies

Question 1

define bond energies

Answer 1

the amount of energy required to break one mole of a particular covalent bond

Question 2

is bond breaking endothermic or exothermic

Answer 2

• bond breaking is endothermic
• it requires energy to break bonds

Question 3

is bond making endothermic or exothermic

Answer 3

bond making is exothermic

Question 4

how to tell if a reaction is endothermic or exothermic

Answer 4

• overall change = energy required to break bonds - energy released by forming bonds
• if the value is positive, it is exothermic
• if the value is negative, it is endothermic