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11 Cards in this Set

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What is the rate law?
The rate of a reaction is the change in concentrations of the reactants divided by the time. The rate law for almost all reactions, aA + bB -> cC + dD, has a rate proportional to [A]^a [B]^b.
Rate = k [A]^a [B]^b
What is a zero-order reaction?
Zero-order reactions have a constant rate, and they occur independently of the concentrations of the reactants.
What is a first-order reaction?
First-order reactions have a rate proportional to [A]^x, where x = 1. The rate is therefore proportional to the concentration of one reactant.
What is a second-order reaction?
Second-order reactions have a rate proportional [A]^1[B]^1, or a rate proportional to [A]^2.
What about the third-order and higher order reactions?
They are also feasible.
How are chemical reactions usually accelerated?
-increasing the concentrations of reactants.
-increasing the temperature of reaction.
-increasing the surface area of reaction.
-the presence of a catalyst.
(Under activation NRG and enthalpy.) What does Ea stand for?
Ea is the activation energy of the reaction.
(Under activation NRG and enthalpy.) What does tri H represent?
What is collision theory?
It is a theory that states that reactant molecules must possess the correct orientation and enough energy to combine and form an activated complex.
What is the definition of half-life?
The half-life is the length of time required for the concentration of a reactant to decrease to one-half of the original amount.
Half - Life ; Given x grams use what equation to find out the final product remaining?
x/(2^n) = remaining amount.
X = number of grams
n = number of half-lives