Welcome to the section on First Law of Thermodynamics, probably an extensively asked portion in the subject of Thermodynamics in GATE. 

Important formulas:

First Law equations: 

  •  for a process
  •  for a cycle
  • Steady Flow Energy Equation: 

Enthalpy: 

Specific Heats:

Steady Flow Systems:

  • Nozzle and Diffuser:   
  • Throttling:    
  • Turbine and compressor:    

 

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