How Do I Calculate the Enthalpy of Isooctane at 500 K?

[siddharth23]

I have to calculate the enthalpy of isooctane at 500 K.

Isooctane is a liquid at room temperature and whenever enthalpy is to be calculated, it is from the standard state (278 K temperataure, 1 atm pressure).

Do I calculate enthalpy upto boiling point, then use latent heat of vaporization and from that point calculate enthalpy upto 500 K using h = mC_pΔT ? And if so, do I use the same value of C_p throughout?

 

[Bystander]

What's the question say? Is it specific? Free form? Approximate?

 

[siddharth23]

It says to calculate the enthalpy of isooctane at 500 K on a kJ/kmol basis

 

[Bystander]

You haven't been given any constraints beyond units, so you are free to do as you wish.

 

[Chestermiller]

You haven't given the exact and complete problem statement.

 

[Dr Uma Sharma]

Can you post the question again with more information ?