Rates Of Reactions Flashcards
If the temperature rises during a reaction, what is the name of this type of reaction
Exothermic
What is produced in a reaction if effervescence occurs?
A gas
Name two ways to collect a gas given off in a chemical relation
Downward displacement of water
Gas syringe
What are physical changes?
Physical changes are not chemical reactions as no new substance is produced
Name 3 physical changes
Possible answers
Dissolving Evaporating Freezing Melting Cutting into smaller pieces Condensation
The smaller the particle size the
Faster the reaction
The larger the partial size
The longer the reaction
The more concentrated the solution
The faster the reaction
The higher the temperature
The faster the reaction
The lower the temperature
The slower the reaction
Reactants ->
Products
When the temperature falls the name of the reaction is a
Endothermic reaction
What is the definition of a catalyst
A catalyst speeds up a chemical reaction without being used up or remaining chemically unchanged
What is a biological catalyst
An enzyme is a biological catalysts
What is the equation for the average rate of reaction
Average rate = change in factor
——————————
Time taken for change
Found On page 3 of the data book
Name 3 signs that a chemical reaction is taking place
A smell is produced A solid is produced A colour change Temperature change Fizzing (effervescence)
