Bond energies Flashcards
1
Q
What occurs during a chemical reaction ?
A
Old bonds broken and new bonds formed.
Energy must be supplied to break existing bond = bond breaking is endothermic process
Energy is released when new bons are formed - Bond formation is an exothermic process
2
Q
In exothermic reaction ..
In endothermic reaction ..
A
the energy released by forming bonds is greater than the energy used to break them.
The energy used to break bonds is greater than the energy released by forming them
3
Q
Each chemical bond has
A
bond energy which varies depending on compound the bond occurs in
4
Q
Page 140 read
A
AQA
