BIOS1167 Lecture 3: Week 3 Notes
4 Sep 2018
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Document Summary
Makes around 70% of mass of the human body. Blood is a solution of substances in water. Extracellular and intracellular fluid creates a watery environment. Polar molecule, polar covalent compound or molecule positively and negatively charged ends. Thermal properties: high melting (h2o = 0deg, ch4= -183deg) and boiling (h2o= 100deg, ch4=-162deg) points, high heat capacity, high heat of vaporisation. Heat capacity: defined as the amount of heat energy required to raise the temperature of a defined amount of a substance by one degree. Thus, water can absorb a relatively large amount of heat without undergoing a large change in temperature. Defined as the amount of heat energy necessary to vaporize a given amount of liquid without changing its temperature. Energy required to overcome the molecular forces of attraction between molecules of a liquid. Bring them to a vapour state where such attractions are minimal.
