Heat of Dilution

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Navigation: User Guide -> Heat of Dilution

Overview

The Heat of Dilution, dH_diln, of a specie is the change in enthalpy when a solution of concentration M₁ is diluted to a final concentration of M₂. The most pronounced effects of heat of dilution can be observed with mixtures of acids and water, such as Sulfuric Acid and Nitric Acid.

If the user enters heat of dilution data for a specie into the Specie Database then SysCAD will automatically calculate the heat of dilution when diluting and concentrating streams and in reactions.

Note: Heat of Dilution is only implemented in SysCAD 9.2.

Implementation in SysCAD

• Entering Heat of Dilution Data in the Specie Properties Database - Heat of dilution data is usually entered as a table of Enthalpy of Formation (at 25°C) at different mass fractions in the Specie Properties Database.

• Heat of Dilution in Reactions - Heat of Dilution is normally used in reaction energy calculations, but it may be set to zero.

• Heat of Dilution Information in a Project - If Heat of Dilution information is entered in a project this can be seen in the Specie Properties Access Window (View - Species Data).

• Example Project with Heat of Dilution - This gives a description of an example project that demonstrates the use and effect of Heat of Dilution data.