Engineering Thermodynamics
First law of thermodynamics

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

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Engineering Thermodynamics
The condition for the reversibility of a cycle is

The working parts of the engine must be friction free
All the processes, taking place in the cycle of operation, must be extremely slow
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All of these

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