Enthelpy of Reaction at other than 298K

[juice34]

I am curious as to how to calculate the heat of reaction for a exothermic chemical reaction other than at 298.15K. This is more of a check than anything else and anyone elses input on how to obtain more accurate results will be greatly appreciated. Here we go

I want to calculate the heat of reaction for a process at let's say 600K, although i have the known heat of reaction at 298K as well as the Cp at 298K.

Part A)
From what i know,
the new heat of reaction is=integral(Cp(298K), 298K,600K)=delta H at 600K [kj/mol], correct?

Part B)
although, i have found other references that have conflicting reports on the Cp to use, some say use the Cp at 600K, in the above equation, which i don't think makes sense?

Part C)
The logical way, if i know the Cp at 600K (calculated from the shomate), i can just multiply the Cp(600K)*T(600K), correct?

Part D)
As far as getting more accurate values, obtaining the residuals (by calculation of course) will give the best numerical value.(from an old thermo book)

 

[Zefram]

Part A) Yes, you are correct. The heat of reaction at 600K can be calculated by integrating the Cp values from 298K to 600K.

Part B) It is important to use the correct Cp values for the temperature range you are interested in. If you are calculating the heat of reaction at 600K, you should use the Cp values at 600K. Using the Cp values at 298K may not give an accurate result.

Part C) Yes, you can use the Cp values at 600K to calculate the heat of reaction at 600K. However, it is important to make sure that the Cp values you are using are accurate and reliable.

Part D) Yes, obtaining residuals can help in obtaining more accurate results. Residuals are the differences between the experimental data and the calculated values. By minimizing these residuals, you can improve the accuracy of your calculations. However, it is also important to use reliable and accurate data in your calculations.