Read e-book online Chemical Thermodynamics at a Glance (Chemistry At a Glance) PDF

By H. Donald Brooke Jenkins

ISBN-10: 1405139978

ISBN-13: 9781405139977

Chemical Thermodynamics at a look presents a concise assessment of the most ideas of Chemical Thermodynamics for college kids learning chemistry and comparable classes on the undergraduate point. in line with the hugely winning and scholar pleasant at a look technique, the data is gifted in built-in, self contained double web page spreads of textual content and illustrative fabric. the cloth constructed during this publication has been selected to make sure the scholar grasps the essence of thermodynamics, so these in need of an available evaluation will locate this e-book an amazing resource of the data they require. moreover, the dependent presentation will supply a useful reduction to revision for college kids getting ready for examinations.

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Extra resources for Chemical Thermodynamics at a Glance (Chemistry At a Glance)

Example text

1 Gas (initial volume, Vi ) expands a distance, dx, at a fixed temperature, T , against a piston enclosing it with pressure, P ext (corresponding to a force, F , exerted over a cross-sectional area, A) to a final volume, Vf . xi and xf represent the initial and final positional coordinates of the piston and the overall change in volume, dV = Vf − Vi . e. e. e. changing its phase) and so pushes external (atmospheric) pressure backwards in order to increase its volume. so doing work on surroundings w3(< 0, lost from system).

If we search the literature to find a compound whose standard enthalpy of formation, f H o is close to zero, one example is silver (I) chlorite, AgClO2 (s). 9) which is virtually zero, yet the decomposition of the material proceeds spontaneously (gently warming is all that is needed to start the kinetics of the decomposition off). The driving force here is no longer enthalpy change (since H o ≈ 0). e. 9) 1 mole of solid decomposes to give 21/2 moles of gas in a reaction which has no enthalpy change to drive it.

11). 3 Multiple Conditions Imposed The point being made in this section is that once conditions have been imposed they then apply to all subsequent equations. It is less important here to appreciate the exact significance of the symbols themselves. 11)) to differentiate the two product forms (PV) and (TS) arising. We assume now that T and P are constant (conditions 1 and 2). This could correspond to that of a system which is open to the atmosphere (hence P ≈ 1 bar) and at constant temperature (T = 298 K).

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Chemical Thermodynamics at a Glance (Chemistry At a Glance) by H. Donald Brooke Jenkins

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