Chemical_Kinetics(MAH)_(NXPowerLite) Opp

Chemical_Kinetics(MAH)_(NXPowerLite) Opp - Chemical...

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Unformatted text preview: Chemical Kinetics C h e m ic a l K in e t ic s • 100’s of free ppt’s from www.pptpoint.com library c s 6.1 Rates of Reaction (2h) Rate of reaction can be defined as “the decrease in the concentration of reactants per unit time or the increase in the concentration of product per unit time”. Consider the reaction 2H 2 (g) + 2NO(g) → 2H 2 O(g) + N 2 (g) The rate of disappearance of H 2 is the same as the rate of disappearance of NO. It is also the same as the rate of appearance of H 2 O and HALF the rate of appearance of N 2 from the stoichiometry of the INTRODUCTION TO REACTION RATES: Work in your table groups to write down an example of A very, very fast chemical reaction A chemical reaction that takes about 5 – 10 minutes to occur. A chemical reaction that takes several years to happen A chemical reaction that takes thousands or millions of years to occur. Cooking/digesting food are both examples of medium rate chemical An example of a chemical reaction, perhaps related to food, that you would want to slow down speed up Can you write down a link between how fast a chemical reaction is and the time it takes for that reaction to occur? Rate is……………….. For the disappearance of a reactant: Change in some property/ time unit The value is given a – sign For the appearance of a product: The value is given a + sign At Grade 10 level you learnt that chemical reactions occur when the particles in the reacting substances collide with each other with sufficient energy to produce new product chemicals. Why do gases, liquids and solutions tend to react faster than solids at the same temperature? Controlling reaction rates is an economic necessity. We need to produce chemicals as cheaply as possible, which usually means as quickly as possible. Working in your table groups, try to list at least 5 different factors which affect how fast a chemical reaction occurs. Collision Theory As the reactants heat up, the particles move faster and so collide more often and with more energy. When they react, they must have enough energy to overcome the activation energy needed by the reaction. A rough energy to overcome the activation energy needed by the reaction....
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Chemical_Kinetics(MAH)_(NXPowerLite) Opp - Chemical...

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