Engineering Thermodynamics
Extensive property of a system is one whose value

Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state
Does not depend on the mass of the system, like temperature, pressure, etc.
Depends on the mass of the system like volume

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Engineering Thermodynamics
Mond gas is obtained by

Carbonisation of bituminous coal
Passing steam over incandescent coke
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Passing air and a large amount of steam over waste coal at about 650°C

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