Date of Award

5-5-2011

Document Type

Thesis

Degree Name

Chemistry, MS

First Advisor

Mark Draganjac

Committee Members

Earl Benjamin; Hideya Koizumi

Call Number

LD 251 .A566t 2011 K29

Abstract

A non-isothermal method using TG/DTA instrument have been used to find the thermal decomposition and dehydration studies of Cobalt Chloride and Cobalt Bromide with electropositive metals like Cd, Fe, Cr, Zn and Mn under argon gas flow. The TG/DTA plots reveal that there is loss of approximately six moles of water from CoCl2.6H2 O and TG/DTA plot of CoBr2 did not show any peaks and we are uncertain on thermal decomposition of CoBr2. The change in enthalpy (ΔH) of Cobalt Chloride with metals Cd and Mn was calculated by using standard conditions because JANAF tables did not have the heat capacity values and Fe was calculated using Kirchoff's equation. The ΔH values obtained were negative supporting the TG/DTA plots. The change in enthalpy (ΔH) of Cobalt Bromide with metals Zn and Mn was calculated using standard conditions and the obtained ΔH values were negative indicating an exothermic reaction supporting the TG/DTA plot. The variations in thermal behavior of CoCl2.6H2 O and CoBr2 were not comprehensive when reacted with electropositive metals like Cd, Fe, Cr, Zn and Mn. The entire study may act as a base for conducting future studies of CoCl2.6H2 O and CoBr2 in various industries.

Rights Management

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Included in

Chemistry Commons

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.