A gas istaken through the cyclic process described in Figure. a) Find the net energy transferred to thesystem by heat during one complete cycle. b) If the cycle is reversed -- that is, the process follows thepath ACBA -- what is the net energy input per cycle by heat?

Question

A gas istaken through the cyclic process described in Figure.  a) Find the net energy transferred to thesystem by heat during one complete cycle. b) If the cycle is reversed -- that is, the process follows thepath ACBA -- what is the net energy input per cycle by heat?

AGRFTr · Accepted Answer

a) The net energy transferred to the system by heat during one complete cycle  Q=(12)⋅AC⋅BC=(12)⋅(2⋅5m3)⋅(8−2)kPa  =30 kJ  b) If the cycle is reversed -- that is, the process follows the pathACBA  The net energy input per cycle by heat =same as above but negative =-30kJ

Jeffrey Jordon · Accepted Answer

Using first law of thermodynamics   △v=g−w  But for cyclic process  △v=0  ∴g=w  a) Work done is given as area enclosed by graph of cyclic process  ∴g=12[4m3][6kPa]  g=12kJ  b)When the process is reversed the net energy input will be  g=-12kJ

A gas istaken through the cyclic process described in Figure.FSP02510400771.gif

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