The Enthalpy and Entropy of Reaction for Formation of P+QA-from Excited Reaction Centers ofRhodobactersphaeroides

2000 ◽  
Vol 122 (7) ◽  
pp. 1479-1485 ◽  
Author(s):  
Gregory J. Edens ◽  
M. R. Gunner ◽  
Qiang Xu ◽  
David Mauzerall
Keyword(s):  
Reaction Centers ◽  
Enthalpy And Entropy ◽  
Entropy Of Reaction

scholarly journals Kinetics of Thermal Degradation of Recycled Polyvinyl Chloride Resin

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
I. M. Alwaan
Keyword(s):  
Thermal Degradation ◽  
Polyvinyl Chloride ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Rate Of Reaction ◽  
Different Temperatures ◽  
Zero Order Reaction ◽  
Enthalpy And Entropy ◽  
Kinetics Of ◽  
Entropy Of Reaction

The goal of this study is to find the effect of time and temperature on the thermal degradation of recycled polyvinyl chloride (PVC) resin. The isothermal rate of reaction(r)of recycled PVC resin was investigated at the following temperatures to: 100, 110, 120, 130, and 140°C at period of times ranging from 10 to 50 min. The result shows that the rate of reaction(r)of recycled PVC increases with increasing temperatures. The reaction rate constant(K)for temperatures ranging from 100 to 140°C was doubled from 0.028–0.056 mol·L−1·S−1. The process was found to be zero order reaction at all range of temperatures 100–140°C. The activation energy of the thermal weight loss was calculated at different temperatures(E/R = 2739.5°K). The average enthalpy and entropy of reaction at temperature of 298°K were determined.

scholarly journals Shared thematic elements in photochemical reaction centers.

1993 ◽  
Vol 90 (5) ◽  
pp. 1642-1646 ◽  
Author(s):  
J. H. Golbeck
Keyword(s):  
Photochemical Reaction ◽  
Reaction Centers
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