2, it is possible to assess the value of both specific heats
 The Engineering ToolBox, Specific Heats
for Metals, https:// www.engineeringtoolbox.com/specific-heat-metals-d_152.html.
For the calculation of the exchanged heat amount between the two reference states of the observed system, the average values of the registered temperatures of the system elements, their masses and specific heats
were used :
The influences of temperature-dependent specific heats
of the working fluid on the performance characteristics were investigated for an air-standard reversible Miller cycle  and irreversible Miller cycle with different specific heat
models ; the total cycle volumes and pressure ratios of the Miller cycle were depicted with graphics at maximum power density conditions  by Al-Sarkhi et al., and Zhao and Chen  analyzed the performance of an air-standard irreversible Miller cycle by introducing the pressure ratios and considering the irreversibilities during the cycle processes.
In reviewing Equation (14), the effect of pressure drop on heat transfer rate relative to change in temperature is increased for liquids with lower densities and lower specific heats
such as hydrocarbon blends and silicone oils.
The new model uses properties (referred to as critical properties) of PCMs such as latent heat storage capacity, melting temperature and specific heats
which are available from experiments and manufacturer.
After many successful years in the engine business, he joined Black to conduct experiments on the determination of specific heats
and latent heats.
The 28 experiments include specific heats
of substances, chromatography, reaction stoichiometry, gravimetric analysis of a chloride compound, the concentration of acetic acid in vinegar, colligative properties, and gas laws.
With these hypotheses about the partition of kinetic energy Clausius was able to deduce some consequences concerning the specific heats
solid and liquid specific heats
. However recent research indicates that some materials may follow the same curve (referred as non-transition model in this paper) during melting and freezing in the phase change region as shown in Figure 4(b).
Again, we have to remember that the specification is for PS and we are molding PP, and the densities and specific heats
or heat capacities are different.