Entropy

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Entropy

The level of disorder in a system.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

Entropy

Disorder in any system. It is the opposite of efficiency.
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References in periodicals archive ?
The values of enthalpy change (IHo) and entropy change (ISo) were estimated from the slope and intercept of the plot (ln Kc versus 1/T).
Results Obtained for Different Geometries Quality Circular Octagonal Hexagonal Entropy Change, 0.941 0.92 0.854 J/kgK (0.000224) (0.000219) (0.000203) (Btu/lb[degrees]R) Surface Area, 0.044 0.043 0.042 [m.sup.2] ([ft.sup.2]) (0.47) (0.46) (0.45) Cross-sectional Area, 0.00118 0.00106 0.00097 [m.sup.2] ([ft.sup.2]) (0.013) (0.011) (0.010) Reynolds Number 254.65 260.2 264.8 Heat Flux, 9847.7 8899.33 7732.22 W/[m.sup.2] (3121.7) (2821.1) (2451.1) (Btu/[hft.sup.2]) Table 4.
Therefore, these large values of the magnetic entropy change and RCP and the nontoxic and less-expensive constituent elements make this system a promising material for magnetic cooling applications.
Caption: Figure 6: The magnetic entropy change as a function of temperature of the [Mn.sub.5-x][Fe.sub.x][Ge.sub.3] compounds, for magnetic field changes of 10 kOe (1T) to 50 kOe (5 T).
Hence, the entropy change in the human physiological system shows the extent of activity within the body as a whole; thus, the entropy change is a significant quantity that characterizes the human body from both thermodynamic and holistic (i.e., considering a human body as a whole) viewpoints.
Various thermodynamic parameters such as enthalpy changes (H) entropy changes (S) and Gibbs free energy changes (G) were used to determine the spontaneity of biosorption process.
The related quantities, Mach numbers and pressures ratios, compression rate, and entropy change are presented in Figures 3-7 and Table 2 for a monatomic gas with [gamma] = 5/3.
The Second Law assures us that since the isolated process did occur, the entropy change must be greater than or equal to 0.
The frequency factor A and entropy change ?S can be determined by the following equations:
Although no simple set of properties can define the performance of a magnetocaloric material used in an AMRR, the two parameters that provide the most meaningful basis for comparison are the adiabatic temperature change with magnetization ([T.sub.ad]) and the specific entropy change with magnetization ([DELTA][s.sub.M]).
Similarly, the entropy change of protein plus carbohydrates during their combustion is [DELTA][S.sub.c] (protein plus carbohydrates)= 0.56 MJ/K.