From the ionic radii given in Figure 7.7, calculate the potential energy of a Ca2+ and O2- ion pair that is just touching (the magnitude of the electronic charge is given on the back inside cover). Calculate the energy of a mole of such pairs. How does this value compare with the lattice energy of CaO (Table 8.2)? Explain the difference.
Biology 101 Chapter 8 Notes “An Introduction to Metabolism” The Energy of Life o The living cell is a miniature chemical factory where thousands of reactions occur o The cell extracts energy stored in sugars and other fuels and applies energy to perform work o Some organisms even convert energy to light, as in bioluminescence Concept 8.1 o An organism’s metabolism transforms matter and energy, subject to the laws of thermodynamics o Metabolism is the totality of an organism’s chemical reactions o Metabolism is an emergent property of life that arises from orderly interactions between molecules Organization of the Chemistry of Life into Metabolic Pathways o A metabolic pathway begins with a specific molecule and ends with a product o Each step is catalyzed by a specific enzyme o Catabolic pathways release energy by breaking down complex molecules into simpler compounds o Cellular respiration, the breakdown of glucose in the presence of oxygen, is an example of a pathway of catabolism o Anabolic pathways consume energy to build complex molecules from simpler ones o The synthesis of protein from amino acids is an example of anabolism Bioenergetics is the study of how energy flows through living organisms o Energy is the capacity to cause change o Energy exists in various forms, some of which can perform work o Forms of Energy: o Kinetic energy is energy associated with motion o Heat (th