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Which of the following processes are thermodynamically reversible
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If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called
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In an isothermal process, the internal energy
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Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant
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Total heat of a substance is also known as
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According to first law of thermodynamics
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Addition of heat at constant pressure to a gas results in
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Carnot cycle has maximum efficiency for
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Carnot cycle efficiency is maximum when
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Carnot cycle efficiency depends upon
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If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly
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An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be
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If a system after undergoing a series of processes, returns to the initial state then
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A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is