This violates basic paradigm of what the user inputs the user gets.
If this is necessary, this needs to be a cpp utility program that is run before the main simulation.
Adding the attribute allow_discontinuities="true" to a phase's
'thermo' node (CTML) or adding 'allow_discontinuous_thermo' to a
phase's 'options' argument (CTI) will disable the automatic adjustment
of the provided polynomials so that enthalpy and entropy are
continuous at the midpoint temperature.
To eliminate discontinuities in Cp/R, H/RT and S/R between the high- and
low-temperature NASA polynomials, formulate and solve a linear least squares
problem for a set of 11 coefficients (3 of the original coefficients 14 being
eliminated by the continuity requirements) which minimizes the changes in the
computed properties at a set of temperatures covering the valid temperature
range.