Engineering Thermodynamics
In an isothermal process

There is no change in temperature
There is no change in internal energy
There is no change in enthalpy
All of the listed here

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Engineering Thermodynamics
Mond gas is obtained by

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

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Engineering Thermodynamics
Extensive property of a system is one whose value

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

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