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)

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

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Engineering Thermodynamics
First law of thermodynamics

Enables to determine change in internal energy of the system
Does not enable to determine change in entropy
Provides relationship between heat, work and internal energy
All of these

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Engineering Thermodynamics
Mond gas is obtained by

Carbonisation 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
Passing steam over incandescent coke

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