C3 4.2 Energy Changes in Reactions

Multiple choice questions on energy changes in reactions.

?
  • Created by: Rhiannon
  • Created on: 29-04-12 10:08
Energy is used to _____ chemical bonds.
break
1 of 9
This energy is the ______ energy for the reaction.
activation
2 of 9
When bonds are made energy is _______.
released
3 of 9
If more energy is needed to ______ bonds than is released when new bonds form, the chemical reaction is ______.
break/endothermic
4 of 9
If more energy is released when bonds are _____ in the products than is used in _____ the bonds in the reactants, the chemical reaction is ______.
made/breaking/exothermic
5 of 9
Energy change is represented by the symbol ______.
ΔH
6 of 9
The symbol above is negative for _______ reactions.
exothermic
7 of 9
The symbol above is positive for _____ reactions.
endothermic
8 of 9
Energy changes in reactions are measured in ______.
KJ/mol
9 of 9

Other cards in this set

Card 2

Front

This energy is the ______ energy for the reaction.

Back

activation

Card 3

Front

When bonds are made energy is _______.

Back

Preview of the front of card 3

Card 4

Front

If more energy is needed to ______ bonds than is released when new bonds form, the chemical reaction is ______.

Back

Preview of the front of card 4

Card 5

Front

If more energy is released when bonds are _____ in the products than is used in _____ the bonds in the reactants, the chemical reaction is ______.

Back

Preview of the front of card 5
View more cards

Comments

Mirte

Report

oh dear just revised this and got 44% :O

Similar Chemistry resources:

See all Chemistry resources »See all Energy of reactions/Exothermic and endothermic reactions resources »