Answer:
Liquid oxygen evaporates at only a slightly higher temperature than liquid nitrogen because they have similarly low attraction between molecules. This would mean less liquid oxygen is coming out of tank 3 because some of it is evaporating as a gas instead.
The liquid oxygen machine producing less liquid oxygen than normal because liquid oxygen cover less space than gaseous oxygen.
Liquid oxygen will be formed when we compressed the gaseous oxygen into the small volume.
The portable unit carries more oxygen and is significantly lighter than a normal oxygen gas cylinder because oxygen in its liquid state takes up less space and can be stored at far lower pressures than oxygen in its gaseous state.
Hence the liquid oxygen machine producing less liquid oxygen than normal because in the gaseous state it will expands and cover more space.
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