BBS C2 Chemical Reactions

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What do we call a reaction that gives out heat energy so the temperature increases?

Exothermic
What do we call a reaction that takes in heat energy so the temperature decreases?

Endothermic
What does BENDOMEX stand for?

Bond Breaking is ENDOthermic bond Making is EXothermic
How can you measure a temperature change in a reaction?

Use a thermometer and take the temperature Before and After the reaction
What type of energy change does this represent?

Exothermic
What type of an energy change does this represent?

Endothermic
Which 4 factors can affect the rate of a reaction?
- Temperature
- Concentration
- Surface Area
- Catalyst
Which has a bigger surface area, lumps or powder?

Powder
Why does increasing the temperature increase the rate of the reaction?
- The particles move quicker
- so there are more frequent collisions
- and more frequent successful collisions
Why does increasing the concentration increase the rate of the reaction?
- There are more particles of the reactant
- so there are more frequent collisions
- and more frequent successful collisions
Why does increasing the surface area increase the rate of the reaction?
- There is a larger area to react with
- so there are more frequent collisions
- and more frequent successful collisions
What is a catalyst?

It speeds up a reaction but remains chemically unchanged
What must particles do in order to cause a reaction?

Collide with enough energy
How could you measure the rate of a reaction?
- Time how long it takes to produce a certain volume of gas
- Time how long it takes to stop reacting
Where is a catalytic converter found and what does it do?
- Vehicle exhausts
- It converts poisonous gases into less harmful ones through OXIDATION
If you are asked to draw a graph to show the effect of changing something which affects the rate of the reaction, what should you make sure you do?

Start at the same point and end at the same point

Author

across2015

331709

Card Set

BBS C2 Chemical Reactions

Description

BBS C2 Chemical Reactions

Updated

2017-05-24T13:17:16Z