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Oak National Academy
12 questions
Physical changes are easily reversible by changing the ___, for example changing the state of water from ice to liquid by heating, and back to ice by cooling.
Why are some reactions reversible?
If the forward reaction of a reversible reaction is exothermic, the backward reaction will be ___.
To carry out the experiment with hydrated and anhydrous copper sulfate, put the steps in order:
How can reaction conditions be changed so that reaction rates change?
Models have limitations. What does this image of the particle model **NOT** attempt to show?
Hot coffee cooling to room temperature is a reversible process. It is a ___ rather than a chemical change.
Equilibrium is a state where opposing forces or processes are balanced. Which statements MUST be true at chemical equilibrium?
Dynamic equilibrium occurs in a ___ system when forward and backward reactions occur at the same rate, and the concentrations of reactants and products remain constant.
A closed system of a glass container is filled with NO_2 under conditions which allows the equilibrium with N_2O_4 to be established. Why will you never observe a colourless situation?
Match the following key terms to their definition.
The models of water with food colouring, or of cars entering/leaving a road, are unhelpful for the ‘dynamic’ aspect of equilibrium, as you cannot see that individual molecules are continuously ___.
