Constant Volume Specific Heat Capacity of the CJ State of Nitromethane

The objective of the present study is the evaluation of cv, the constant volume heat capacity along a locus of CJ states of nitromethane. Nitromethane (NM) was chosen because reliable measurements of its TCJ are available, and there are requisite other data at varied initial densities ρ0. Acquisition of the latter is accomplished by changing the initial temperature, but this also changes the initial internal energy E0 and creates some problems. An equation for cv was developed which contains the experimental TCJ, assumed to be constant over the rather narrow range of ρ0 of the other input data, and γ = cP/cv, which still needs to be evaluated. Thus only provisional values of cv are presented.