This function calculates the specific heat capacity of R1234yf at constant volume from the state record (e.g., use setState_phX function for input). The specific heat capacity is modelled by the fundamental equation of state of Richter et al (2011).
Please note, that the function can also be called in the two-phase region, but the output is not continuous for a phase transition. Values in two-phase region are considerably higher than in one-phase domain. The following figure just shows one-phase properties.