HARD
AS and A Level
IMPORTANT
Earn 100
Explain why finely divided solids reacts more quickly than solid lumps.
Important Questions on Rates of Reaction
HARD
AS and A Level
IMPORTANT
Explain why raising the temperature increases the rate of reaction.
HARD
AS and A Level
IMPORTANT
Sketch a graph to show the boltzmann distribution of molecular energies. Label the axes.
HARD
AS and A Level
IMPORTANT
Define activation energy.
HARD
AS and A Level
IMPORTANT
Shade an area on the graph to show the number of molecules capable of reacting.
HARD
AS and A Level
IMPORTANT
Mark on a graph a possible activation energy for a reaction in the absence and presence of a catalyst.
HARD
AS and A Level
IMPORTANT
Shade an area on the graph to show the additional number of molecules capable of reacting because of the presence of a catalyst.
HARD
AS and A Level
IMPORTANT
Draw a curve on your graph to show the Boltzmann distribution of molecular energies at a slightly higher temperature.
HARD
AS and A Level
IMPORTANT
The Haber process is used in industry to convert nitrogen and hydrogen to ammonia. The formation of ammonia gas is exothermic. Sketch the enthalpy profile for the Haber process in absence of catalyst.
