The average velocity of a chemical reaction can be given by the ratio of concentration change to reaction time.
Follow the formula and then the explanations.
Vm = average velocity (mol / L / s)
concentration range (mol / L)
time variation (s, min)
module (result must be positive, speed must be positive)
Units may vary.
Example: Note the transformation of acetylene to benzene:
The average velocity (up to the final process) or partial velocity can be calculated. Dice:
- Calculation of speed after 4 minutes:
- Speed calculation between 1 and 2 minutes:
The average velocity of a chemical reaction may also be related to the disappearance reaction and the onset reaction, as follows:
The units can be:
Knowing the information about one of the reaction participants, we can calculate the speed of the other participants and even the average reaction speed.
Take the case of ammonia synthesis:
Dividing the velocity calculated for either participant by its own stoichiometric coefficient will result in the same calculation as the other participants.
These calculations can also be made by rule of three.