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Ammonia equilibrium question.

Last updated 12 months ago
5 questions
3

The reaction between nitrogen and hydrogen to form ammonia is reversible.

The reaction mixture can reach a dynamic equilibrium.

Which of these statements describes what is happening at equilibrium?

Put ticks (✓) in the boxes next to the two correct statements.

  • The forward and reverse reactions happen at the same rate.
  • The concentration of ammonia is increasing.
  • All of the nitrogen and hydrogen react to make ammonia.
  • The forward and reverse reactions happen at the same time
  • The reaction between nitrogen and hydrogen has stopped.
  • The concentrations of nitrogen, hydrogen and ammonia are constant
  • True
  • False
3

Economic considerations
to be economically viable need to make as _________ ammonia as possible as ____________ as possible and the conditions are a ______________________ between these two factors.
Other Answer Choices:
much
compromise
quickly
5

Temperature.
Higher temperature shifts equilibrium to _________ as the reverse reaction is ________________ so the higher the temperature the __________the yield.
At lower temperature the rate of reaction is too _________
so a _______________ medium temperature of about 450°C is used
Other Answer Choices:
lower
left
endothermic
right
slow
compromise
exothermic
7

Note the Edexcel specification pressure is 200 Atm


Pressure
higher pressure shifts equilibrium to __________ the side with __________ (LHS 4 gas moles vs RHS 2 gas moles).
The higher the pressure the ___________ the yield because forward reaction decreases _____________
higher the pressure the tougher the reaction vessel has to be so that it does not burst
higher pressure increases _________ .
_______________ medium pressure of ________ atmospheres
Other Answer Choices:
right
fewer
higher
cost
200
compromise
pressure
7

Note the Edexcel specification pressure is 200 Atm


Catalyst
catalyst gives more product in same _________
catalyst allows use of __________ temperature for same rate
catalyst does not change ________________ position
(Note a catalyst provides an ________________ reaction pathway of lower _______________ energy so a greater proportion of the particles ___________ the activation energy so the frequency of _______________ collisions increases even though the total number of collisions is not changed).
Other Answer Choices:
activation
time
equilibrium
alternative
lower
successful
exceed