Gases, Reversible Reactions And Ammonia Flashcards
How can you work out the volume of gas
Mass of gas divided by formula mass of gas
Multiplied by 24
What is a reversible reaction
One where the products of the reaction can themselves react to produce the original reactants
What is dynamic equilibrium
The reactions take place in both directions producing the same amount so they cancel each other out
How can you move the position of equilibrium
Change the temperature or pressure to give more product and less reactant
What will happen to the position of equilibrium if you raise the temperature
The endothermic reaction will be favoured to use up the extra heat
What will happen to the. Position of equilibrium if you reduce the temperature
The exothermic reaction will be favoured to give out more heat
What will happen to the position of equilibrium if you raise the pressure
It will favour the reaction which produced less volume
What will happen to the position of equilibrium if you lower the pressure
Will favour the reaction that produces more volume
What so nitrogen and hydrogen produce
Ammonia
What is the pressure and temperature of the ammonia reaction
Pressure 200
Temperature 450
What is the catalyst used in the production of ammonia
Iron
Why is the pressure set to 200 in ammonia reaction
High pressures favour the forward reaction - to produce ammonia
So it is set as high as possible to give the best percentage yield without making the plant too expensive to build
What would happen if you increased the temperature in the ammonia production
The equilibrium would be favouring the wrong side towards ammonia making nitrogen and hydrogen because it is an exothermic reaction
What is the problem with having a low temperature
The reaction goes slower
Why do they set the temp to 450
It’s a compromise
Gives a low yield but in a quicker amount of time
