rates of reaction Flashcards
what is rate of reaction?
how fast a reaction takes place
how are faster rates of reaction shown on graphs?
steeper gradients
what does rate of reaction depend on?
temperature
concentration
size of particles
what is the collision theory?
particles colliding with enough energy to react
what does the rate of a chemical reaction depend on? (collision theory)
collision frequency
amount of successful collisions
energy transferred during collisions
what is a catalyst?
increases rate of reaction
how do catalysts work?
decreasing activation energy needed for a reaction to occour
what are enzymes?
biological catalysts
what do enzymes do?
speed up chemical reactions in living cells
what is an exothermic reaction?
gives out energy to surroundings
what is an endothermic reaction?
takes in energy from surroundings
what is activation energy?
minimum amount of energy needed for bonds to break
what is a neutralisation reaction?
acid and base react to form salt and water
what happens during a chemical reaction?
old bonds are broken
new bonds are formed
