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Question

The work done equals \(\smallint pdv\) for

The correct answer is

Non–flow quasi-static process

In a non-flow quasi-static process, the pressure at the moving boundary is well defined, so boundary work is \(W_b=\int_{V_1}^{V_2}p\,dV\). For specific volume v, the corresponding specific work is \(w_b=\int p\,dv\). Quasi-static motion alone does not guarantee full reversibility; friction can still be present. Paddlewheel work is not boundary work.

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Important Questions from First Law of Thermodynamics

  1. Heat transfer in a cyclic process are +20 kJ, -5 kJ, -10 kJ and +15kJ. Net work done for this cycle will be given by:

  2. An open system is one in which ______.

  3. A system will be in thermodynamic equilibrium only if it is in ____.

    A. Thermal equilibrium

    B. Mechanical equilibrium

    C. Chemical equilibrium

  4. The gas constant (R) is equal to the _____ of two specific heats.

  5. In a reversible adiabatic process the ration \(\left( {\frac{{{T_1}}}{{{T_2}}}} \right)\) is equal to:

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