When evaluating MER using an
ideal body
weight, the average life stage factor used to
approximate their daily energy requirement was 2.0 ± 0.5 with a range from 1.1 to 2.8.
Now, there's around four times as much nitrogen in the atmosphere as oxygen and since nitrogen in its diatomic form is difficult to break to form compounds, then it could be said to
approximate to an
ideal gas (elastic collisions not inelastic), and, oxygen and nitrogen don't combine in the atmosphere but mix, and, oxygen is practically the same
weight as nitrogen, and, oxygen has practically the same heat capacity, then, not a bad approximation to the
ideal gas of Jelbring's thought experiment.