Section Solution Options

It is clear that as we have 6 equations and 8 variables, only 6 of the variables may be unknown for us to be able to solve the equations. This means that values must be given for two of them.

(We may either think of this as reducing the number of unknowns by replacing two of them by numerical values, or as augmenting the set of equations by adding another two which have the simple form of, e.g.:

P = 1.013

T = 293

Typical options for the specifications are as follows:

In each case all the remaining variables are determined. The solution methods required in each of the above cases are interestingly different. These will be explored in examples.

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