collision theory
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54 Terms
catalyst
substance that speeds up the reaction by lowering the activated complex and activation energy.
chemical potential energy
energy stored in a substance because its composition which is released or absorbed by heat
endothermic reaction
reaction in which the products have more energy than reactants - involved in breaking bonds
energy
capacity to do work or produce heat
exothermic reaction
reaction in which reactants have more energy than the products - involved in forming bonds
inhibitor
substance that slows down a reaction from occuring
surrounding
everything in the universe except for the system
system
specific part of the universe containing the reaction or process
It makes sure that the atoms can share or transfer electrons effectively.
Why is orientation of atoms during a collision important?
likely to rebound without reacting
If a collision between molecules is very gentle - low energy, the molecules are…
decreases
According to the collision theory, as the concentration of reactants decreases, the rate of reaction…
catalyst
What lowers the Activation Energy?
more room for reactant particles to collide (once something is split)
What does more surface area allow for?
concentration
how much dilute is dissolved in a solution; more particles in same volume - measure of this amt of substance
- more particles, more collisions faster reaction rate
temperature
increase temperature, increase kinetic energy, increase
Collisions faster reaction rates
surface area
smaller the particles, larger the surface area to allow
more collisions to occur, faster reaction rates
exothermic
system to surroundings
endothermic
surroundings to system
endothermic
process of breaking bonds
exothermic
process of forming bonds
decreases
What happens to the temperature of the surroundings, as bonds break on the reactant side?
increases
What happens to the temperature of the surroundings, as products form bonds?
exothermic - MORE ENERGY COMING OUT THAN GOING IN
up arrows then down arrows --> endo or exo
cacl2 dissolving in water
Temperature
Water (Before adding
CaCl 2 )
25.0 0 C
Water (After adding
CaCl 2 )
40.0 0 C. --> What is the system?
500ml beaker
Temperature
Water (Before adding
CaCl 2 )
25.0 0 C
Water (After adding
CaCl 2 )
40.0 0 C. --> what is the surrounding of the reaction?
exothermic
Temperature
Water (Before adding
CaCl 2 )
25.0 0 C
Water (After adding
CaCl 2 )
40.0 0 C. --> endothermic or exothermic?
endothermic
absorbs energy
exothermic
reactants have more energy than products
endothermic
temperature decreases
endothermic
products have more energy than reactants
exothermic
temperature increases
exothermic
releases energy