Figure 1:
Reaction progress (DSC, normalized signals) of a low-temperature decomposed substance as a function of time for the Las Vegas, New York and Quebec temperature profiles.
 

Figure 2:
Reaction rate d/dt (DSC, normalized signals) of a low-temperature decomposed substance as a function of time for the Las Vegas, New York and Quebec temperature profiles.
 

Figure 3:
Average daily minimal and maximal temperatures recorded for each day of the year between 1961 and 1990 (Las Vegas, New York and Quebec).

Let us calculate the solid state reaction extent of a low-temperature decomposed substance in Las Vegas, New York and Quebec (Fig. 1). It can be seen that within 10 years, the degree of the decomposition amounts to about 50 % in Quebec whereas in Las Vegas and New York full conversion is reached after 2 and 6 years, respectively.