Скачать или смотреть Chemical Equilibrium: Working out the concentration of gases using ICE method

In this video learn how to use a balanced equilibrium equation to work out the equilibrium constant, K , from the concentrations of reactants / products given in a question. This worked example looks at the Haber process with given starting concentrations of one equilibrium value.

Part 1:
Step 1 : Write mole ratio from balanced equation given
Step 2 : Prepare your ICE
Step 3 : Insert your Initial concentration of reactants given from the text.
The products always have a value of 0 at time 0.
Step 4 : Insert the Equilibrium value given in the text from the entity given.
Step 5 : Use the entity which has TWO values: An Initial and Equilibrium value.
Initial - Equilibrium = Change
Step 6 : Use the Change and the mole ratio to scale for all other entities.
Step 7 : Repeat Step 5

Part 2:
Step 1 : Write Expression using entities and mole ratio from balanced equation
Step 2: Insert your equilibrium values into expression and calculate K.
Step 3: Use the ∆H value given to decide which position the equilibrium naturally lies.
Step 4: Use the Temperature change given to show what impact this would have to position of equilibrium and therefore the impact on the constant K