HARD
AS and A Level
IMPORTANT
Earn 100
Mark on a graph a possible activation energy for a reaction in the absence and presence of a catalyst.
Important Questions on Rates of Reaction
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.
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 presence of a catalyst.
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. Label the activation energy on the energy profile.
HARD
AS and A Level
IMPORTANT
The activation energy for the uncatalysed decomposition of ammonia to its elements is . Write the equation for this reaction including state symbols.
HARD
AS and A Level
IMPORTANT
The activation energy for the uncatalysed decomposition of ammonia to its elements is . The enthalpy of reaction for this decomposition is . Calculate the activation energy for the uncatalysed formation of ammonia from nitrogen and hydrogen.
HARD
AS and A Level
IMPORTANT
The activation energy for the uncatalysed decomposition of ammonia to its elements is . If tungsten is used as a catalyst, the activation energy changes. Explain how it will change.
