Engineering Thermodynamics
In order that a cycle be reversible, following must be satisfied

Free expansion or friction resisted expansion/compression process should not be encountered
When beat is being rejected, temperature of cold source and working substance should be same
All of these
When heat is being absorbed, temperature of hot source and working substance should be same

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Engineering Thermodynamics
The specific heat at constant volume is

The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
The amount of heat required to raise the temperature of 1 kg of water through one degree
Any one of the above
The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume

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Engineering Thermodynamics
Mond gas is obtained by

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

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Engineering Thermodynamics
According to Avogadro's law, for a given pressure and temperature, each molecule of a gas

Occupies volume inversely proportional to its molecular weight
Occupies volume proportional to its specific weight
Occupies same volume
Occupies volume inversely proportional to its specific weight

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