GCSE Chemistry C2 - Section 4 Rates of Reaction Flashcards
The minimum amount of energy that particles must have in order to react is called . . .
the activation energy
When the concentration of a reactant solution is increased, the rate . . .
increases
In a reversible reaction the amount of energy absorbed in the forward reaction is . . .
the same as the amount released in the reverse reaction
A reaction that transfers energy to its surroundings is called . . .
exothermic
We can work out the rate of reaction from a rates graph by . .
measuring the gradient of the line at any given time
A reaction that takes energy from its surroundings is called . . .
endothermic
At a higher temperature collisions are . . .
more frequent AND harder
The surface area of a solid reactant can be increased by . . .
grinding it up (turning it into a powder)
If the surface are of a solid reactant increases the rate of reaction . . .
increases
As the reaction temperature increases the rate of reaction . . .
increases
Increasing the surface area of a solid reactant increases the rate because . . .
the frequency of collisions increases
In reversible reactions, if the forward reaction is endothermic the reverse reaction will be . . .
exothermic
Endothermic reactions can be used in. . .
cold packs for sports injuries
A catalyst is a substance that . . .
speeds up a chemicla reaction without being used up
2 ways that exothermic reactions can be used are . . .
hand warmers, self heating cans
