For example, if concentration is in  mol L–1  and
time is in seconds then the units will be mol L-1s–1 However, in gaseous
reactions, when the concentration of gases is expressed in terms of their
partial pressures, then the units of the rate equation will be atm s–1 From the concentrations of C4H9Cl (butyl chloride) at different times given
below, calculate the average rate of the reaction:
C4H9Cl  +  H2O  ®  C4H9OH + HCl
during different intervals of time t/s
0
50
100
150
200
300
400
700
800
 [C4H9Cl]/mol L–1 0