- #1

JD_PM

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- TL;DR Summary
- I am trying to find the specific heat (at constant pressure) ##C_p## coefficients linked to the JANAF model

I am trying to find the specific heat (at constant pressure) ##C_p## coefficients linked to the JANAF model, which basically assumes that ##C_p## is a polynomic function of ##T##, for liquid nitrogen (at ##\approx## 97 K).

Before doing that, I am trying to find those for water (at ##\approx## 300 K) and verify that they are ##9850.69, -48.6714, 0.13736## and ##-0.000127063##.

I am looking into NIST data for water; I checked both gas and condensed thermochemistry data but the coefficients don't match with the above. I also checked the NIST-JANAF thermo tables, for water, but the coefficients are not there.

How to find the desired coefficients for water (at ##\approx## 300 K)? They should be somewhere in the NIST-JANAF table.

Once I see the above it should be straightforward to find those for liquid nitrogen

Thank you!

PS: Actually, I am implementing the thermo-physical properties of liquid nitrogen.

Before doing that, I am trying to find those for water (at ##\approx## 300 K) and verify that they are ##9850.69, -48.6714, 0.13736## and ##-0.000127063##.

I am looking into NIST data for water; I checked both gas and condensed thermochemistry data but the coefficients don't match with the above. I also checked the NIST-JANAF thermo tables, for water, but the coefficients are not there.

How to find the desired coefficients for water (at ##\approx## 300 K)? They should be somewhere in the NIST-JANAF table.

Once I see the above it should be straightforward to find those for liquid nitrogen

Thank you!

PS: Actually, I am implementing the thermo-physical properties of liquid nitrogen.