Engineering Thermodynamics
The universal gas constant (or molar constant) of a gas is the product of

Molecular mass of the gas and the specific heat at constant pressure
Molecular mass of the gas and the gas constant
Molecular mass of the gas and the specific heat at constant volume
Atomic mass of the gas and the gas constant

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Engineering Thermodynamics
An isolated system is one in which

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

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Engineering Thermodynamics
According to Dalton's law, the total pressure of the mixture of gases is equal to

Greater of the partial pressures of all
Sum of the partial pressures of all
Average of the partial pressures of all
Sum of the partial pressures of all divided by average molecular weight

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Engineering Thermodynamics
Producer gas is obtained by

Passing steam over incandescent coke
Carbonization of bituminous coal
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

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