Temperatures Influence on Reaction Rates

Influence of Temperature on Reaction Rate In my initial preliminary experiments, we had to investigate the effect of the temperature of sodium thiosulfate and hydrochloric acid on the reaction rate. Its chemical formula is as follows. [IMAGE] Sodium thiosulfate + sodium chloride + sulfur dioxide + sulfur + water [IMAGE] Na 2 S 2 O 3 (aqueous solution) + HCL (aqueous solution) NaCl (aqueous solution) + SO 2 (aqueous solution) + S H 2 O (1) Solid Sulfur (S (s)) produced in Hydrolyzing a colorless solution.

According to the law of thermodynamics, the temperature should affect the reaction rate and the rise in temperature should result in an increase in the reaction rate. It is well known that proteins tend to degenerate as their local environment temperature rises above a certain value. Therefore, it is thought that the increase in the rate of enzyme catalyzed reaction does not become infinite. If the temperature rises to the denaturation point, the reaction does not proceed or the reaction rate rapidly drops to the level of non-catalytic reaction. so. Almost zero

Chemical reactions are affected by temperature. At low temperatures, the reaction is slow because of the small energy of the molecule. As the temperature rises, the reaction rate also rises. If the temperature is too high, some of the chemical substances in the reaction are actually destroyed and the reaction stops. Enzymes are catalysts for specific biological reactions and are influenced by temperature. In this experiment, measure the enzyme activity in solution and measure the effect of 5 different temperatures (30 ° C, 40 ° C, 50 ° C, 60 ° C, and 70 ° C). Using the color key, you will be able to determine the rate of enzymatic reaction at these different temperatures. It is also possible to determine the temperature at which the approximate optimal temperature or enzyme activity is highest.

As with most chemical reactions, the rate of enzymatic catalysis increases with increasing temperature. Temperature rise of 10 degrees Celsius raises the activity of most enzymes from 50% to 100%. Changes in reaction temperature as small as 1 or 2 degrees can introduce 10 to 20% change in results. In the case of enzymatic reactions, this is complicated as many enzymes are adversely affected by high temperatures. As shown in FIG. 13, the reaction rate rises to the maximum value with temperature and then drops sharply as the temperature further increases. Since most animal enzymes degenerate rapidly at temperatures above 40 ° C, most enzyme assays are performed below this temperature.