WorksheetsEnergetics
Total questions: 10
Worksheet time: 5mins
Quicklime has which formula?
CaO2
CaO
CaCO3
CuO
Exothermic reactions are ones that.....
Release energy to the surroundings
Absorb energy from the surroundings
Remain at a constant temperature
Decrease in temperature
Neutralisation reactions always....
stay the same temperature
decrease in temperature
increase in temperature
Increase at first and then decrease at the end
Adding energy to get a reaction started is.....
Activation energy
Catalytic
never needed
needed for breaking bonds
Combustion reactions are ......
always resulting in an increase in temperature
never decrease in temperature
always result in a zero enthalpy change
never have temperature increases
An example of an endothermic reaction is......
burning
neutralisation
thermal decomposition
metal and acid reactions
the thermite reaction.....
relies on displacement
absorbs more heat that is releases
is useful for repairing broken train tracks
uses thermal decomposition as its basis
endothermic reactions ........
have more energy in their products
have less energy in their products
have more energy in their reactants
have the same amount of energy in reactants and products
A minus figure in an enthalpy change is....
a mistake
sometimes caused by the wrong reactants
no significance
tells you it is an exothermic reaction
The amount of energy change in a reaction is known as.....
endothermic
Delta H
exothermic
Mole/Mass/delta H
