science-rates of reaction
the rate of reaction can be increased by
increasing the surface area
increasing the temperature
increasing the concentration of reactants
using a catalyst
lowers the activation energy
can also slow down reactions
endothermic
exothermic
cools down
takes heat from surroundings
heats up
gives out heat to surroundings
exit
combustion
most common
Collison theory
the more particles collide, there will be a greater rate of reaction
defines rate of reaction #
energy is needed to break covalent bonds
breaking bonds is endothermic
energy is released when new covalent bonds are made
making bonds is exothermic
the energy of the products is less than the energy of the reactants
the energy of the products is greater than the energy of the reactants
reversible reactions
Expressed in the form of A+B↔C+D
Top arrow represents forward reaction
bottom arrow represents backwards reaction
equilibrium
forward arrow matched backwards arrow #
no effect on the position of equilibrium but makes the reactants reach it faster