Flashcards in Chemistry Paper 2 Deck (49):
What is a closed system?
No substance was leave or enter
What is a fuel?
Something burned to release heat
How is crude oil formed?
Fossil remains of plankton formed over million of years
What is a property of long-chain hydrocarbons?
What is a saturated hydrocarbon?
Molecule that only contains hydrogen and carbon and no double bonds
What is the general formula for alkanes?
What bonds are found in alkanes?
Formula of propane
Formula of butane
One use of LPG
Unsaturated hydrocarbon example
Formula of propane?
What would happen if bromine was present?
Orange/brown to colourless
What two functional groups are in amino acids?
Anime and carboxylic acids
What catalyst is used in fermentation?
What is a diol?
Alcohol with two hydroxyl groups
Catalyst used in ammonia
Why do manufacturers want to increase rate of reactions
Reduce energy costs
How do catalysts work
Add surface area for molecule to attach to
One use of diesal
Fuel for cars
Property of short-chain hydrocarbons
Gases or volatile liquids
Contains double bonds
Test to identity alkane from Allene
Add bromine water
Catalyst used to form alkane molecules
What compound is CH3CH2CH2OH
What is a dicarboxylic acid?
Molecule with 2 carboyxlic acid groups
What is the functional group of CH3CH2COOH
What is the pH of a COOH
Less than 7
Use of thermosetting
Why does thermosetting not soften when heated
Cross links between polymer chains
What does pure mean
One type of element/compound
Melts at 34 is it pure
Yes only has one melting point
Disadvantages of flame test
Some colours may mask others in compound
Why is no Rome wire used
What planet has similar atmosphere to Earth before
What does CCS stand for
Carbon capture and storage
What does CCS do
Stops CO2 going into air
What does carbon neutral mean?
No overall increase in CO2
How does climate change affect rainfall
Some increase,some decrease
What is fresh water?
Low levels of salt and microorganisms
What can sterilise water?
What’s an ore
Naturally occurring rock containing metal
What is smelting
Ore heated with carbon which is more reactive
What is bioleaching?
Bacteria used to remove metal from leachapt solution
Why is aluminium not protected?
Creates layer of aluminium oxide which protects metal
Why is high pressure used?
Higher pressure increases yield
Why use fertilisers?
Replace nutrients in soil
Why must fertilisers be soluble?
Taken up by roots of plant