Enthalpy
What is measure of chemical energy stored within substances?
H(positive) + OH(negative) --> H2O
what is the ionic equation of a neutralisation reaction
NO-->N2 NO2-->O2 CO-->CO2
describe one of the gas conversions in a catalytic converter
one litre
1000cm^3 equals to
gives out
An exothermic reaction ______ ___ energy.
...it's formula mass in grams (GFM)
a mole of a substance is... (is equal to)
yes
Is the haber process an example of a heteroegenous catalyst?
I2, Br2, Cl2, F2, O2, N2, H2
Name the the 7 diatomic molecules?
moles per litre
what is the concentration of a substance is measured in?
...activation energy
molecules can react if they've got enough...
a certain amount of energy in order for a reaction to occur
What is activation energy?
neutralisation
Enthalpy of _________ is the enthalpy change per mole of water formed when an acid is
neutralised by an alkali.
solution
The enthalpy of _____ is the enthalpy change that occurs when one mole of a substance dissolves
completely in water
A large surface area means higher chance of collision
What are the effects of particle size?
decreasing particle size, increasing concentration, increasing temperature
Reaction rates could be speed up by:-
Because the lead atoms produced stick to the surface of the catalyst and stop the converter
from working
Why must lead-free petrol (unleaded) be used?
as the reactants
homogeneous catalysts are in the same state as what?
...being used up...recovered unchanged at the end of reaction
Catalysts speed up reactions without...and can be...
different
Heterogeneous catalysts are in the same? or different? state as the reactants
takes in
An endothermic reaction _____ __ energy.
number of moles
volumes of gases are directly proportional to the ...?
the unstable arrangement of atoms form at the maximum of potential energy.
What is an activated complex?
alkali, salt
Acid + _______ --> ____ + water
Neutralisation
When an acid reacts with an alkali or other base what occurs?
no of particles increase which means more chances of collisions
what are the effects of concentration?
|
