Paper 2 Flashcards
What is the haber process
Producing ammonia using nitrogen and hydrogen and a reverseable reaction between both elements
What is ammonia used for
Fertillisers,dyes and explosives
Difference between exothermic and endothermic
Exothermic=taking energy out/away
Endothermic=taking in energy
How hot are the pressurised gasses heated to
450 degrees
How much is the pressure of mixture of gassed increased
200 atmospheres
What are polymers
Contain very large molecules and joined together by strong covalent bonds in long chains
What does pure mean
Consists of one element or one compound
What is a mixture
Consists of two or more different substances not chemically joined together
True or False
The temperature stays the same when a pure substance changes state
True
What is a formulation
A mixture which has been designed as a usefull product e.g fuels,paints,medicines,fertillisers and food
What is chromatography
This is used to identify the presents of a substance in a mixture often ink or food colouring
What is the mobile phase in chromatography
The solvent that moves through the paper ,carrying different substances with it
What is the stationary phase in chromatography
This is contained on the paper and does not move through it
Name 3 green house gasses
- Carbon dioxide
2.water vapour - Methane
What do greenhouse gasses do
They absorb heat from the earth and release energy in all directions to keep it warm
Why does climate change cause sea levels to rise
- Glaciers melt
- Temp increases and sea water warms up and expands
