The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition?

Related Mcqs:

1. On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

   A. (∂P/∂V)S = (∂P/∂V)T
   B. (∂P/∂V)S = [(∂P/∂V)T]Y
   C. (∂P/∂V)S = y(∂P/∂V)T
   D. (∂P/∂V)S = 1/y(∂P/∂V)T

2. A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?

   A. Δ S1 is always Δ SR
   C. Δ S1 is always > Δ SR
   D. Δ S1 is always = Δ SR

3. 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

4. The work done in isothermal compression compared to that in adiabatic compression will be__________________?

   A. Less
   B. More
   C. Same
   D. More or less depending upon the extent of work done

5. In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________?

   A. n = y = 1.4
   B. n = 0
   C. n = 1
   D. n = 1.66

6. For an isothermal reversible compression of an ideal gas_______________?

   A. Only ΔE = 0
   B. Only ΔH =0
   C. ΔE = ΔH = 0
   D. dQ = dE

7. The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is_________________?

   A. R loge 4
   B. R log10 4
   C. Cv log10 4
   D. Cv loge 4

8. Which of the following non-flow reversible compression processes require maximum work ?

   A. Adiabatic process
   B. Isothermal process
   C. Isobaric process
   D. All require same work

9. During a reversible isothermal expansion of an ideal gas, the entropy change is_________________?

   A. +ve
   B. 0
   C. -ve
   D. ∞

10. During a reversible isothermal expansion of an ideal gas, the entropy change is___________________?

    A. +ve
    B. 0
    C. -ve
    D. ∞