Engineering Thermodynamics
If the value of n = 0 in the equation pvn = C, then the process is called

Constant volume process
Adiabatic process
Constant pressure process
Isothermal process

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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
Mass crosses the boundary but not the energy
Neither mass nor energy crosses the boundaries of the system

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Engineering Thermodynamics
Carbonization of coal consists of

Heating the wood with a limited supply of air to temperature not less than 280°C
Moulding the finely ground coal under pressure with or without a binding material
None of these
Drying and crushing the coal to a fine powder

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