By H. Donald Brooke Jenkins
Chemical Thermodynamics at a look offers a concise evaluate of the most rules of Chemical Thermodynamics for college kids learning chemistry and comparable classes on the undergraduate point. in line with the hugely profitable and scholar pleasant at a look procedure, the data is gifted in built-in, self contained double web page spreads of textual content and illustrative fabric. the fabric built during this e-book has been selected to make sure the scholar grasps the essence of thermodynamics, so these short of an available review will locate this ebook an awesome resource of the knowledge they require. furthermore, the dependent presentation will supply a useful relief to revision for college kids getting ready for examinations.
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Additional info for Chemical Thermodynamics at a Glance (Chemistry At a Glance)
Example text
29) Ti for a process taking place at constant volume. Such calculations as these are usually only made for gases when the change in entropy, S tends to be significant (and not for solids and liquids). Entropy, S and entropy changes, S will be discussed further in Frames (13–17) etc. 33 11. 1 Tabulated Thermodynamic Data. g. solid (s) or crystalline (c), liquid (l), aqueous (aq) or gas (g)). In much of this frame we shall be o assuming that the heat capacities, Cp,m , are temperature independent.
15 K then the Cp,m values required will be those tabulated in thermochemical databases. Frame 11 discusses further the use of heat capacity. e. a process taking place as a succession of equilibrium states) and T is the (constant) temperature at which this process takes place. 18), Frame 13 and used again in Frame 14. e. 1). K = Kelvin. Similarly by analogy: Tf S = Cv,m . 29) Ti for a process taking place at constant volume. Such calculations as these are usually only made for gases when the change in entropy, S tends to be significant (and not for solids and liquids).
25 8. 1 Heat, q and Work, w The concept of heat, q, being transferred is a familiar experience. ) is relatively unfamiliar. Work is done when a force, F, moves through a distance, dx. 2) xi In thermodynamics the sign attributed to w depends on the acquisitive convention already described (Frame 7). If a system is doing work on the surroundings it is losing energy and this is regarded as being negative by our convention. e. 5) The fact that Pext is constant enables it to be taken outside the integral sign (Frame 2).