
TY  - JOUR
A1  - Deshpande, DD 
A1  - Bhatgadde, LG 
T1  - Heat capacities at constant volume, free volumes, and rotational freedom in some liquids
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1971
VL  - 24
IS  - 9
SP  - 1817
EP  - 1822
KW  - 
UR  - https://doi.org/10.1071/CH9711817 
N2  - This paper presents the experimental results on the velocity of sound, densities, and heat capacities of eight organic liquids at 25°, 35°, and 45°C. Using Eyring's equation, the free volumes have been calculated from the sound velocity data. For pure liquids, a quantity Cv* = (Cv)L- (Cv)g- Cstr called the residual heat capacity is found to be linearly dependent on free volume. Analysis of the data for 34 liquids shows that a plot of residual heat capacity against the free volume gives a series of straight lines differing in slopes for different groups of liquids such as hydrocarbons, halogen-substituted hydrocarbons, alcohols, etc. This behaviour is ascribed as being due to different degrees of rotational freedom of molecules in these liquids. 
ER  -

