A gas performs the maximum work, when it expands___________________?

Related Mcqs:

1. Maximum work that could be secured by expanding the gas over a given pressure range is the _____________ work?

   A. Isothermal
   B. Adiabatic
   C. Isentropic
   D. None of these

2. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law)____________________?

   A. V1/V2
   B. V2/V1
   C. V1 – V2
   D. V1.V2

3. The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?

   A. 2M
   B. M/2
   C. M
   D. M/4

4. A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the _____________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?

   A. Logarithmic
   B. Arithmetic
   C. Geometric
   D. Harmonic

5. An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to_________________?

   A. 12 P1V1
   B. 6 P1 V1
   C. 3 P1V1
   D. P1 V1

6. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

   A. Nature of the liquid
   B. Nature of the gas
   C. Temperature of the liquid
   D. Total pressure

7. The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?

   A. Isobaric
   B. Isothermal
   C. Adiabatic
   D. None of these

8. The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by_________________?

   A. (∂E/∂ni)S, v, nj
   B. (∂G/∂ni)T, P, nj = (∂A/∂ni) T, v, nj
   C. (∂H/∂ni)S, P, nj
   D. All (A), B. and (C)

9. The work done in an adiabatic change in a particular gas depends upon changes in the ______________ only?

   A. Temperature
   B. Specific heat
   C. Volume
   D. Pressure

10. 4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is_________________?

    A. 4 J
    B. ∞
    C. 0
    D. 8 J