In the simulations, increasing TInit had the effect of increasing the zeolite specific heat capacity and removing water from the sample, decreasing the sample absorbance in the laser-pumped OH stretch region of 3600 cm -1 . These changes result in the simulated T-jump magnitude diminishing with increased starting temperature. Figure compares the T-Jump magnitude, ΔT, achieved at each temperature in both the experimental and simulated datasets. The reduction in simulated and experimental ΔT with increased temperature is readily apparent, as are the changes in ΔT diminishing as a function of temperature at higher temperatures. It can be concluded that the variation in pump absorbance of the zeolite sample has the greatest effect on T-jump magnitude, with changes in heat capacity being small enough in this temperature range that they are of secondary importance.