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Chapter IV Thermal Studies of …..
metal tartrate crystals. Hajiyani et al [35] reported the study of kinetic and
thermodynamic parameters for decomposition bis thiourea strontium chloride
crystals.
The estimated thermodynamic parameters are given in table (4.1). It
can be noticed that on increasing the doping of amino acids in KDP, the value
of standard entropy and standard enthalpy decrease, whereas the value of
standard Gibbs energy increases. In an isolated system a process being
considered is attended by an increase in entropy (∆ # S o ) is known as the
spontaneous process, which occurs itself [32]. The single crystalline nature of
the sample is the most order form of the sample and the dehydration of the
sample brings the disorder in the sample, obviously the large value of ∆ # S o in
the case of pure KDP crystals is obtained than the doped crystals.
Comparing the nature of the thermodynamic parameters listed in Table
(4.3) with table (4.2), one can suggest easily from the positive values of ∆ # H o
and ∆ # S o that the reaction is spontaneous at comparitively high temperature.
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