3.2 Controlling The Rate Flashcards
In an industrial process, what is the risk if the reaction rate is too low?
The process will not be economically viable
In an industrial process, what is the risk if the reaction rate is too high?
Risk of explosion
Name 5 factors that have an affect on reaction rate
-concentration
-pressure
-surface area (particle size)
-temperature
-collision geometry
What 3 factors affect whether a reaction can take place or not?
-Particles must collide
-Particles must collide with sufficient energy
-The colliding particles must have the correct collision geometry
How is enthalpy change for a reaction calculated?
The enthalpy change is the energy difference between the products and the reactants.
What is activation energy?
The activation energy is the minimum energy required by colliding particles to form an
activated complex
What sign will an exothermic reaction have?
negative
What sign will an endothermic reaction have?
positive
What is an activated complex?
The activated complex is an unstable arrangement of atoms formed at the maximum of the potential
energy barrier
What is temperature?
Temperature is a measure of the average kinetic energy of the particles in a substance.
What effect will a catalyst have on activation energy?
A catalyst will lower activation energy
What effect will a catalyst have on enthalpy change?
No effect
