Expressing and Measuring Reaction Rates. SCH 4U. Expressing Reaction Rates. Understanding the rate of a reaction can be very important to understanding the reaction and its effects on the surroundings
Rate of reaction = Amount of Afinal - Amount of Ainitial (mol)
timefinal - timeinitial
=Δ amount of A
A = amount of the compound of interest in units of mol or mol/L
The amount of the compound of interest is expressed in units of mol when we are talking about a solid, or in units of mol/L when we are studying a solution phase or gaseous phase reaction.
Rate of reaction has units of mol/s or mol/L .s
Rates of reactions are always positive.
Δt 4 Δt
Δ[O2] = -1 Δ[N2O5]
Δt 2 Δt
Ammonia NH3 ,reacts with oxygen to produce nitric oxide, and water vapour
At a specific time in the reaction, ammonia is disappearing at a rate of 0.068 mol/L . s
What is the corresponding rate of production of water?