The cp of a working substance is known to be 2.0 kJ/kg-K at 500 K. A software

Question:

The cp of a working substance is known to be 2.0 kJ/kg-K at 500 K. A software is used to simulate the heating of the substance at constant pressure (cp). It produces the following behavior: At 500 K, it produces an enthalpy (h) of 2000 kJ/kg, while at 501 K, it produces a value of 2005 kJ/kg. Do you trust this software? (Yes:1; No:0) If not, why?