All rights reserved. Terms of use. Â¨ 37 11 Thermodynamics andThermochemistry Thermodynamics is the study of heat, and how heat can be interconverted into other energyforms. In thermodynamics the system is a specific part of the universe that is being studied,often the system is a chemical reaction. The surroundings are all parts of the universe that arenot the system, typically everything outside the test tube.Â¥ An open system can exchange both energy and matter with its surroundings.
Pepsin splits proteins into water-soluble fragments called peptones. Although this ordinarily occurs in the stomach, it can be duplicated in a large reaction vessel on a commercial basis. Partial digestion by pepsin can be used in food applicationsâfor instance, in the processing of soy protein and gelatin.
Instructions. 1  Pepsin Pepsin is âan inactive form of pepsinogen that is produced in the stomachâ. 2  It activates only during the digestion process and breaks down the proteins in the food into components like peptones, proteoses and polypeptides.nlike pepsin, pepsinogen can be converted to pepsin by hydrochloric acid (HCL). Pepsinogenâs secretion is stimulated by histamine, vagal stimulation and gastrin, whereas the same is not the case with pepsin. Moreover, pepsinogen is constant in both alkaline and natural solutions, while pepsin is not.