However, use of the gal is deprecated by ISO 80000-3:2006. The gal is a derived unit, defined in terms of the centimeterâgramâsecond (CGS) base unit of length, the centimeter, and the second, which is the base unit of time in both the CGS and the modern SI system.
It has been shown experimentally that if the amount of the enzyme is kept constant and the substrate concentration is then gradually increased, the reaction velocity will increase until it reaches a maximum. After this point, increases in substrate concentration will not increase the velocity (delta A/delta T). This is represented graphically in Figure 8. It is theorized that when this maximum velocity had been reached, all of the available enzyme has been converted to ES, the enzyme substrate complex.
Many processes can lead to an increase in a system's entropy. 1  Increasing the volume that a gas can occupy will increase the disorder of a gas. 2  Dissolving a solute into a solution will increase the entropy of the solute-typically resulting in an increase in the entropy of the system. (Note: the solvation of a solute can sometimes result in a significant decrease in the solvent entropy-leading to a net decrease in entropy of the system). 2  Phase changes from solid to liquid, or liquid to gas, lead to an increase in the entropy of the system.