Thermochemical parameters at high temperature

I wanted to calculate Thermodynamic parameters such as Gibbs Free energy, Enthalpy change and Entropy change using Curtis et al explained as this link: <https://gaussian.com/wp-content/uploads/dl/thermo.pdf>
When calculating these parameters at standard temperature I use this table values for individual atoms like C, H etc (table in page 16 in the above pdf)
I want to know when I calculate at high temperature will these table values remain the same or different? If it differs how to find/calculate them? TIA


[![enter image description here](https://i.stack.imgur.com/1Xayl.png)](https://i.stack.imgur.com/1Xayl.png)


