[Determination of enthalpy change of coordinating color reaction by UV-Vis absorption spectrum method].
In this paper, a simple experimental method for the determination of enthalpy change of coordinating color reaction has been proposed and a relation formula between absorption and temperature has been deduced. Using coordinating color reaction of cobalt(II) thiocyanate in Tween-80 medium, the linear relation of this formula has been validated: r = 0.9957 and delta H = -44.7 kJ.mol-1, which is accordant with the result obtained from Van't Hoff equation.
Yang
D
D
Institute of Biochemical Engineering, Dalian University of Technology, 116012 Dalian.
An
L
L
Chen
L
L
D003035:Cobalt / Q000737:chemistry*; D003116:Color; D004347:Drug Interactions; D008433:Mathematics; D011136:Polysorbates; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013696:Temperature; D013861:Thiocyanates / Q000737:chemistry*
D011136:Polysorbates; D013861:Thiocyanates; C038956:cobalt thiocyanate; D003035:Cobalt