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science section 2
Terms in this set (20)
what's a reaction that needs someone & or something to start?
do all chemical reactions take place at the same rate?
before a reaction can start what needs to happen?
molecules d the reactants have to bump into each other
before new chemical bonds are able to for what has to happen?
atoms have to be very close together
what kind of collision needs to happen for chemical bonds to form?
the collision needs to be strong enough to
what does it mean for a chemical bond collision to be strong enough?
that the bond will not occurs if this does not happen
why is it true that the bond won't occur w the right amount of force?
to form new bonds, the old ones must break on the reactants
what is required in forming new bonds?
that it takes energy
what's true about all chemical reactions?
a minimum amount of energy is needed
what is the activation energy of the reaction?
that any chemical reaction needs a minimum amount of energy
what about reactions release energy?
some need it to start and some let it out
is there an activation energy for these reactions too?
yes even though they release energy & these reactions also need energy to start
what's an example of a reaction that needs energy to start?
what the rate of reaction?
tells how fast a reaction occur after it has started
how do you find the rate of the relation?
you can measure right how quickly on it the reactants is consumed or how quickly one of the products is created
what can you measure to determine the rate of a reaction?
the diminishing amount of wax in a candle as it burns indicates the rate of the reaction
is reaction rate important in industry?
yes because the faster the product can be made, the less it usually costs
if we were talking about food, the slower the reaction rate the longer what?
the food would stay edible
what conditions control the reaction rate?
how can the reaction rate be changed?
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