Chemistry Flashcards
What is a catalyst used for
Speeding up the rate of a reaction
By providing alternative pathways with a lower activation energy
Define an atom
The smallest particle that exists
The building blocks of life
What is an element
A substance made of only one kind of atom
Eg carbon
Define a solid
Particles arranged in a regular order
All the particles are touching their neighbours
Define a liquid p
Particles arranged in an irregular fashion
Particles touching most of their neighbours
Gas
Particles arranged in random
No particles are touching their neighbours order
On a heating curve why does it flatten ourt
Because the energies now being used to break the bonds instead of being used for heat
What does exothermic mean
More energy is released than is taken in than is released
Endothermic means..
More energy is released than is taken in
What is a compound
At leased two different kinds of atoms chemically combined
What is a mixture
Different kinds of particle not chemically combined
How would you separate two liquids
Distillation
How do you convert time into rate
Rate= change in concentration/mass/volume divided by the time
What is activation energy
The energy used to start an reaction
What makes a successful collision
The energy must be greater than the activation energy
