Reversible Reactions/rate Of Reaction Flashcards
What is exothermic reaction?
When energy is transferred into the surroundings.
What is endothermic reaction?
Energy is taken in from the surroundings.
What is equilibrium?
When the rate of forward reaction is equal to the rate of backward/reversed reaction.
What happens to the reaction when the temp increases?
When temp increases, the equilibrium moves to the endothermic direction to remain its current temperature.
What happens to the reaction when temp decreases?
When temp decreases, the equilibrium moves to the exothermic direction to remain its current temperature. Since exothermic direction releases energy into its surroundings.
What happens to reversible reactions in a closed system?
They will reach equilibrium, since everything reacts together due to the products and reactants not able to escape.
What is a reversible reaction?
When the reactants are able to form products, in which these products are able to reform into the reactants.
When Hydrated Copper (II) Sulfate is heated, it loses its
water of crystallization and turns into anhydrous Copper (II)
Sulfate, write the chemical equation.
CuSO4.5H2O (s) ⇌ CuSO4 (s) + 5H2O (l)
To make the forward reaction work, the hydrated copper sulfate must be heated all the time, what type of reaction is this?
Endothermic reaction
What will happen if water is added to anhydrous copper sulfate?
It will be an exothermic reaction. Because energy is released when adding the water.
It will turn blue
It will be turn into hydrated copper sulfate due to the water.
How will a student remove unreacted copper oxide from a copper sulfate solution?
Filtration, they’re able to filter the unreacted copper oxide to remove it.
Why will a reaction be heated up?
To increase the rate of reaction.
What is DYNAMIC equilibrium
when the rate of forward reaction is equal to the rate of backward reaction in a closed system.
Two conditions that can affect the position of equilibrium-
Temperature, and pressure.
H2O2 + H3 = H4
If pressure increases, the equilibrium would move to the direction which has less moles. So the equilibrium moves to the right
If pressure decreases, the equilibrium would move to the direction which has more molecules. So the equilibrium would move to the right.
What is yield of reaction?
The amount of product made in a reaction
Which arrow is exo, and endo?
—> exo
<— endo
If the question has not stated that the compounds have been heated,cooled,etc then just assume this is the case.
How will a student obtain copper sulfate crystals by the copper sulfate solution?
By crystallsation/ heating the solution
What are catalysts?
Are substances that speed up the rate of a chemical reaction without being changed or used up during the reaction.
What are the factors which affect the rates of chemical reactions?
Concentration, pressure, temperature, catalysts, surface area.
What is the formulas of rate of reaction?
Rate of reaction = amount of product formed/Time taken (s)
Rate of reaction = amount of reactants used/time taken (s)
What is collision theory?
Frequency of collisions, or collision theory states how a chemical reaction can only take place if reacting particles collide with eachother with sufficient energy.
What is activation energy?
The minimum amount of energy that particles must have to react together.
