Engineering Thermodynamics
Universal gas constant is defined as equal to product of the molecular weight of the gas and

Specific heat at constant volume
Ratio of two specific heats
Gas constant
Specific heat at constant pressure

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Engineering Thermodynamics
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

All of these
(p1 v1 - p2, v2)/(γ - 1)
[m R (T1 - T2)] /(γ - 1)
[m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]

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Engineering Thermodynamics
Carbonization of coal consists of

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

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