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Chemistry C2 - energetics, equilibria and electrolysis
30 cards·by legacy-4805026@noemail.invalid
chemistry c2
what is the chemical equation for the haber process?
N2 + 3H2 equilibrium 2NH3
if a I increase the temperature of an exothermic reaction, what happens to the yield?
it decreases
increasing pressure does what to a reaction?
decreases the yield
increasing temperature in an endothermic reaction does what to the yield?
increases it
give two examples of exothermic reactions
respiration, neutrilisation
give two examples of endothermic reactions
thermal decomposition and photosynthesis
complete the sentence, " at low temperatures the yield is high but the **** ** ******** is slow
rate of reaction
Charles de gaulle looks like which GSAL english teacher?
Mr.Clarke
what catalyst can we use to speed up the haber process?
an iron catalyst?
what is the compromise pressure and temperature for the haber process?
200 atmospheres at 450 degrees centigrade
what are the four main factors that affect the rate of reaction?
temperature, surface area, concentration and catalyst
what is the activation energy?
the smallest amount of energy particles need to react
what two things happen in relation particles in a reaction when the temperature is increased?
particles collide more often and with more energy
why does increasing the pressure in a reaction increase the rate? refer to particles in your
answer
the more pressure, the closer the particles therefore there are more collisions
definition of a catalyst
a substance that speeds up a chemical reaction but is not itself chemically affected by the
reaction
define: electrolysis
The decomposing (break down) of a substance by passing an electric current through it
What is the name given to the substance broken down by electrolysis
the electrolyte
What is the name of the positive electrode?
anode
the negative electrode?
cathode
the cations are atrracted to what?
the anode
What kind of compound can not be split by electrolysis?
covalent compound
What is the process called in which ions gain electrons to become atoms?
reduction
What is the process called in which ions lose electrons to become?
oxidation
In electrolysis in water, two elements could potentially form at an electrode. Which of the
two elements would form at the electrode?
the less reactive one
what is brine?
sodium chloride solution
what forms when we electrolyise brine?
chlorine and sodium hydroxide
Give a use of chlorine
accept bleach production, purifying swimming pools, PVC production and anal lubrication
Industrial use of Sodium hydroxide
soap or paper
before getting pure copper we must get rid of its what?
impurities
E=MC?
vagina