scholarly journals Heat Capacity Changes of Alkyl-substituted Ammonium Chlorides in Aqueous Solutions

1975 ◽  
Vol 48 (11) ◽  
pp. 3018-3020 ◽  
Author(s):  
Kunio Tamaki ◽  
Satoru Yoshikawa ◽  
Mitsuyoshi Kushida
Keyword(s):  
Heat Capacity ◽  
Aqueous Solutions ◽  
Heat Capacity Changes

Protonation of azobenzene derivatives. I. Methyl orange and ortho-methyl orange

1973 ◽  
Vol 26 (5) ◽  
pp. 1005 ◽  
Author(s):  
PD Bolton ◽  
J Ellis ◽  
KA Fleming ◽  
IR Lantzke
Keyword(s):  
Heat Capacity ◽  
Methyl Orange ◽  
Aqueous Solutions ◽  
Standard Enthalpy ◽  
Acidity Constants ◽  
Temperature Range ◽  
Heat Capacity Changes ◽  
Azobenzene Derivatives

Thermodynamic acidity constants have been measured over the temperature range 5-50� for aqueous solutions of sodium 4?-dimethylaminoazobenzene- 4-sulphonate (methyl orange) and sodium 4?-dimethylaminoazobenzene-2- sulphonate (ortho-methyl orange). From these data values of the standard enthalpy, entropy, and heat capacity changes have been calculated for these compounds. These results are discussed in conjunction with previous spectrophotometric and other data with reference to the nature of the equilibrium systems involved in these protonation reactions. It is concluded that existing evidence does not allow an unequivocal assignment of the sites of protonation of these and related molecules.

scholarly journals Heat Capacity Changes of Some Sodium Alkylsulfates in Aqueous Solutions

1972 ◽  
Vol 45 (9) ◽  
pp. 2939-2940 ◽  
Author(s):  
Kunio Tamaki ◽  
Yoshio Isomura ◽  
Y\={o}ko Ohara
Keyword(s):  
Heat Capacity ◽  
Aqueous Solutions ◽  
Heat Capacity Changes ◽  
Sodium Alkylsulfates
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