Engineering Thermodynamics
A heat exchange process in which the product of pressure and volume remains constant is known as

Isentropic process
Hyperbolic process
Heat exchange process
Throttling process

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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
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Carbonisation of bituminous coal
Passing steam over incandescent coke

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Engineering Thermodynamics
Gases have

Only one value of specific heat
Under some conditions one value and sometimes two values of specific heat
Two values of specific heat
No value of specific heat

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Engineering Thermodynamics
An open system is one in which

Neither mass nor energy crosses the boundaries of the system
Mass does not cross boundaries of the system, though energy may do so
Both energy and mass cross the boundaries of the system
Mass crosses the boundary but not the energy

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