The experimental heat capacity of solid hydrogen as a function of molar volume
Abstract
Constant volume heat capacity measurements were made on six solid hydrogen samples with low orthohydrogen concentrations. The measurements extend from approximately 1.5 K to the melting line, with molar volumes ranging from 22.787 cu cm/mole to 16.193 cu cm/mole. Although clustering of the ortho molecules was observed, the low temperature heat capacity anomaly due to the orthohydrogen pairs could be described quite well by the assumption of a fixed distribution. The data were corrected to obtain a lattice heat capacity which on extrapolation to T=0 yielded Debye temperatures and a volume dependent Gruneisen parameter. A modified MieGruneisen approximation was used to define a volume and temperature dependent Gruneisen parameter which was used to calculate the equation of state, P(V,T), and isothermal bulk modulus, BT(V,T), for the six isochores.
 Publication:

Ph.D. Thesis
 Pub Date:
 May 1978
 Bibcode:
 1978PhDT........93K
 Keywords:

 Density (Mass/Volume);
 Hydrogen;
 Solid State;
 Specific Heat;
 Approximation;
 Concentration (Composition);
 Density Distribution;
 Equations Of State;
 Engineering (General)