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20 Cards in this Set
- Front
- Back
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What is the relationship between thermodynamics and kinetics |
No direct relation ship between spontaneity and speed of reaction |
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What is the basic data for chemical kinetics |
Conc of reactants and products at different times after initiation of reaction |
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Rate of chemical reaction depends on |
1. Conc of reactants 2. Temp 3. Physical state and s.a of reactants 4. Solvent and catalyst properties |
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Average rate is |
Change of conc of designated species |
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Instantaneous rate of consumption of reactants is |
Slope of graph of molar conc against time at instant of interest |
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State rate law |
It's an equation that expresses the rate of reaxtion in terms of molar conc (for partial p) of species in overall reaction |
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What is true about rate law |
It is determined experimentaly It can't be obtained from stoichiometry of reaction |
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State relationship between rate of reaction and molar conc |
Directly proportional |
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Describe relationship between rate constant and concentration |
Relationship is indépendant |
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What does rate constant depend on |
It depends on tempb |
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What is the use of isolation method |
To have a pseudo first order rate |
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What is the integrated rate law |
It's an expression for the concentration of a reactants or product as a function of time |
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Define half life |
Time needed for concentration of a species to fall to half its initial value |
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What does time constant τ represent |
It represents the time required for the conc of a reactants to fall to 1/e of its initial value |
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What happens to rate of chemical reaction when temp is increased |
It increases |
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How senesitve are gas phase reactions to change in temp |
They are weakly sensitive |
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What is activation energy |
It's the minimum kinetic energy required for a reaction during a molecular encounter |
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What is the pré exponential factor (A) |
It's the measure of rate at which collision occurs irrespective of their energy |
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What does high Ea signify |
Strong dépendance of Kr on temp Steeper slope |
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What does it mean to have 0 Ea |
It means that Kr is independent from temp |
