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