AP chem: Chemical Kinetics Flashcards
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| 648884315 | Chemical Kinetics | Area of chemistry concerned with speeds,rates,or reactions | |
| 648884316 | why do reactions depend on the nature of the reactants themselves? | because reactions depend on the breaking and forming of bonds | |
| 648884317 | Factors that affect reaction rates | concentration temperature presence of a catalyst physical state(homogeneous/surface area) | |
| 648884318 | how does surface area affect reaction rates? | surface area increases(giant into tiny) =faster reaction rates | |
| 648884319 | how does concentration affect reaction rates? | concentration increases=faster rate | |
| 648884320 | how does temperature affect reaction rates? | as temperature increases reaction is faster | |
| 648884321 | Are Catalysts used up in reactions? | No | |
| 648884322 | Enzymes | protein molecules that act as catalyts | |
| 648884323 | how do catalysts affect reaction rates? | They increase them | |
| 648884324 | What does reaction rates depend on? | Frequency of collisions between molecules | |
| 648884325 | What does a collision need to produce a reaction? | suitable orientation for new bonds to form and sufficient energy to stretch bonds to a critical length | |
| 648884326 | Reaction rate | change in concentration per unit of time | |
| 648884327 | what does the average rate of disappearance of A equal? | The average rate of appearance of B | |
| 648884328 | why do reaction rates decrease over time? | because the concentration of reactants decrease | |
| 648884329 | Initial rate of reaction | instantaneous rate at 0 | |
| 648884330 | What must be equal for stoichiometry to occur? | The rate of disappearance of A to the rate of appearance of B | |
| 648884331 | how to study the effect of concentration on reaction rate | By determining the way in which the rate at the beginning depends on the starting concentration | |
| 648884332 | Rate Law | equation that relates the reaction rate to the concentration of the reactants | |
| 648884333 | Rate Law equation | K[A]^m[B]^n | |
| 648884334 | Rate Constant | K | |
| 648884335 | What does k determine?why? | How temperature affects rate. because the magnitude of k changes with temperature | |
| 648884336 | Reaction orders | the exponents m and n in the rate law equation | |
| 648884337 | what are m and n in the rate law equation? | exponents determined experimentally | |
| 648884338 | first order | reaction order of 1 | |
| 648884339 | second order overall | add all reaction orders and got 2 overall | |
| 648884340 | how do coefficients affect the rate order? | multiply coefficients and rate order | |
| 648884341 | when will changing concentration have no effect on rate? | When the rate order is 0. | |
| 648884342 | rate of reaction depends on concentration but what does not ? | Rate constant | |
| 648884343 | What affects the rate constant | Temperature and a catalyst |