Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
Explain the collision theory of reactions
|
Chemical reactions require collisions with sufficient energy to break and form bonds
|
|
How is the activation energy of a reaction like a wall or barrier?
|
Reacting particles must have a certain minimum amount of energy to react to form product, just as it takes a certain amount of energy to climb over a wall or barrier.
|
|
How is the rate of a reaction influenced by a catalyst? How do catalysts make this possible?
|
A catalyst increases the rate of reaction by providing an alternative reaction mechanism with a lower activation energy.
|
|
Define a reversible reaction
|
In a reversible reaction, reactants are continually forming products and products are continually forming reactants.
|
|
How do the rates of the forward and reverse reactions compare to a state of dynamic chemical equilibrium?
|
They are equal
|
|
What is Le Chatelier's principal?
|
A system in dynamic equilibrium changes to release a stress applied to it.
|
|
What the solubility product constant (Ksp) represent?
|
The product of in concentrations raised to the power of their coefficients.
|
|
How does the addition of a common ion affect the solubility of another substance?
|
Lowers the solubility
|
|
Is the free energy of a reaction help predict whether the reaction will be spontaneous?
|
A spontaneous reaction has a negative free energy.
|
|
What is the meaning of entropy?
|
A measure of disorder in a system.
|
|
The products in a spontaneous process or more orders than the reactants. Is this entropy change favorable or unfavorable?
|
Unfavorable
|
|
Are all spontaneous processes exothermic? Explain.
|
No, some endothermic processes are spontaneous because of their favorable change in entropy.
|
|
What two factors together detrmine whether a reaction is spontaneous?
|
enthalpy change and entropy change
|
|
Energy that is available to do work is called ___.
|
Free Energy
|