2b Flashcards
What is the activation energy?
The minimum energy required for a reaction to take place
How can you make collisions more frequent?
Increasing the:
- The temperature
- Concentration
- Pressure
- Surface area
How can you lower the activation energy?
Use a catalyst
What can the rate of a reaction be measured by?
- The amount of reactant used up in a set time
2. The amount of product formed in a set time
What kind of reaction is it when energy is given out?
Exothermic
What reactions take in energy?
Endothermic
When is equilibrium reached?
When the rate of the reverse reaction balances the rate of the forward reaction
What happens when a reverse reaction is endothermic in one direction?
It is exothermic in the other
What do the relative amounts of all the reacting substances at equilibrium depend on?
Reaction conditions
What is electrolysis?
When an electric current is passed through an ionic compound and breaks it down into its elements
What does the collision theory state?
Particles must collide with sufficient energy in order to react
What is OIL RIG?
Oxidation Is Loss Reduction Is Gain
What does electrolysis of sodium chloride make?
Hydrogen, chlorine and sodium hydroxide
What happens during electrolysis?
Positive metal ions gains electrons to form atoms
Negative non metal ions lose electrons to form atoms and molecules
What is an example of a exothermic reaction?
Combustion
