Engineering Thermodynamics
Which of the following is the correct statement?

All engines are designed as reversible in order to obtain maximum efficiency.
All the reversible and irreversible engines have the same efficiency.
All the reversible engines have the same efficiency.
Irreversible engines have maximum efficiency.

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Engineering Thermodynamics
First law of thermodynamics

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

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