Past Year Questions: Availability And Irreversibility Notes | EduRev

Thermodynamics

Mechanical Engineering : Past Year Questions: Availability And Irreversibility Notes | EduRev

The document Past Year Questions: Availability And Irreversibility Notes | EduRev is a part of the Mechanical Engineering Course Thermodynamics.
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Question 1:A heat reservoir at 900 K is brought into contact with the ambient at 300 K for a short time. During this period 9000 kJ of heat is lost by the heat reservoir. The total loss in availability due to this process is

Question 2:Availability of a system at any given state is

Question 3:Considering the relationship TdS = dU + pdV between the entropy (S), internal energy (U), pressure (p), temperature (T) and volume (V), which of the following statements is correct?

Question 4:A steel billet of 2000 kg mass is to be cooled from 1250 K to 450 K. The heat released during this process is to be used as a source of energy. The ambient temperature is 303 K and specific heat of steel is 0.5 kJ/kgK. The available energy of this billet is

Question 5:The pressure, temperature and velocity of air flowing in pipe are 5 bar, 500 K and 50 m/s, respectively. The specific heats of air at a constant pressure and at constant volume are 1.005 kJ/kgK and 0.718 kJ/kgK, respectively.Neglect potential energy. If the pressure and temperature of the surroundings are 1 bar and 300 K, respectively, the available energy in kJ/ kg of the air stream is

Question 6:The maximum theoretical work obtainable, when a system interacts to equilibrium with a reference environment, is called


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