Physical Chemistry 4B
Exothermic
Releases heat
Endothermic
Absorbs heat
How temperature affects rate of reaction
– The higher the temperature, the more kinetic energy the particles have so the faster the particles move
– So there are more collisions per second (greater frequency of collisions) and more of the particles have sufficient energy to overcome the activation energy and form products
– So reaction rate increases
– So there are more collisions per second (greater frequency of collisions) and more of the particles have sufficient energy to overcome the activation energy and form products
– So reaction rate increases
How concentration affects rate of reaction
– The higher the concentration, the more particles there are in a given volume
– So there are more collisions per second (greater frequency of collisions)
– So reaction rate increases
– So there are more collisions per second (greater frequency of collisions)
– So reaction rate increases
How surface area affects rate of reaction
– The higher the surface area, the more particles are exposed to each other
– So there are more collisions per second (greater frequency of collisions)
– So reaction rate increases
– So there are more collisions per second (greater frequency of collisions)
– So reaction rate increases
Benefits of using bio fuel
Available, sustainable and can be grown anywhere
Peat
Fuel – accumulation of partially decayed plant matter or organic matter
Chemical reaction