Termolecular rate coefficients and the standard enthalpy of the reaction OH + CS sub 2 + M yields HOCS sub 2 + M

Journal Article · Thu Jan 10 00:00:00 EST 1991 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100154a068· OSTI ID:5876326

Diau, E W; Lee, Yuanpern ^[1]

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1. National Tsing Hua Univ., Hsinchu (Taiwan)

The reaction between OH and CS{sub 2} has been studied in He in the pressure range 9-270 Torr and the temperature range 249-298 K by means of the laser-photolysis/laser-induced-fluorescence technique. Analysis of the temporal profile of (OH) yielded the rate coefficients for the forward and reverse reactions for the equilibrium OH + CS{sub 2} + M {r equilibrium} HOCS{sub 2} + M and hence the equilibrium constant. Study of the temperature dependence of the equilibrium constant leads to the standard enthalpy of reaction {Delta}H{degree} = {minus}43.9 {plus minus} 5.3 kJ mol{sup {minus}1} and the standard entropy of reaction {Delta}S{degree} = {minus}102.9 {plus minus} 15.4 J K{sup {minus}1} mol{sup {minus}1}. The termolecular rate coefficients for the forward reaction at 298 K have also been determined to be k{sub He}{sup III} = (5.04 {plus minus} 1.01) {times} 10{sup {minus}32} cm{sup 6} molecule{sup {minus}2} s{sup {minus}1} and k{sub CS{sub 2}}{sup III} = (4.28 {plus minus} 1.07) {times} 10{sup {minus}31} cm{sup 6} molecule{sup {minus}2} s{sup {minus}1}.

• OSTI ID: 5876326
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 95:1; ISSN 0022-3654
• Country of Publication: United States
• Language: English

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