Equilibrium Ratios and Component Mole Fractions Quiz
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Questions and Answers

How is the equilibrium ratio, Kj, defined?

  • Kj = $\frac{z_j}{y_j}$
  • Kj = $\frac{x_j}{y_j}$
  • Kj = $\frac{y_j}{x_j}$ (correct)
  • Kj = $\frac{y_j}{z_j}$

    • Which equation attributes the total pressure into pressures from each component in the vapor phase?

  • Henry's law
  • Boyle's law
  • Charles's law
  • Dalton's equation (correct)

    • Which method is considered the best way to find Kj, if possible?

  • Kj from measurement of a given mixture at a given temperature and pressure (correct)
  • Kj from various empirical equations (McWilliams, Standing, and Wilson)
  • Kj from ideal fluid behavior (low pressure)
  • Kj from charts and graphs

    • In which scenario is the equilibrium ratio for ideal fluids applicable?

    <p>Low pressure</p> Signup and view all the answers

    What affects each phase in a mixture of components that has both vapor and liquid phases in equilibrium?

    <p>Total pressure in the system</p> Signup and view all the answers

    Explain the mass balance method for calculating the phase behavior of a system and the composition of each phase.

    <p>The mass balance method involves using the overall composition of the mixture, z_j, and the equilibrium ratios of all the components in that mixture to calculate the phase behavior of the system and the composition of each phase.</p> Signup and view all the answers

    List and briefly explain five methods of calculating the equilibrium ratio, Kj.

    <ol> <li>Kj from ideal fluid behavior (low pressure) - applicable for ideal fluids at low pressure. 2) Kj from charts and graphs - using graphical representations to determine Kj. 3) Kj from measurement of a given mixture at a given temperature and pressure - the best way to find Kj if possible. 4) Kj from various empirical equations (McWilliams, Standing, and Wilson) - using empirical equations to calculate Kj. 5) Kj from measurements at a constant temperature and various pressures estimated at different pressures (Hoffman method) - estimating Kj at different pressures.</li> </ol> Signup and view all the answers

    Explain Dalton’s equation and its role in attributing the total pressure into pressures from each component in the vapor phase.

    <p>Dalton’s equation attributes the total pressure in the system into pressures from each component in the vapor phase. It helps in understanding the contribution of each component to the total pressure in the vapor phase.</p> Signup and view all the answers

    Describe the equilibrium ratio for ideal fluids and the scenario in which it is applicable.

    <p>The equilibrium ratio for ideal fluids is applicable at low pressure. It represents the ratio of the mole fraction of component j in the vapor phase, $y_j$, divided by the mole fraction of the same component j in the liquid phase, $x_j$ : $K_j = rac{y_j}{x_j}$. It is applicable when dealing with ideal fluids at low pressure.</p> Signup and view all the answers

    Explain the concept of the equilibrium ratio, Kj, and its significance in phase behavior calculations.

    <p>The equilibrium ratio, $K_j$, represents the ratio of the mole fraction of component j in the vapor phase, $y_j$, divided by the mole fraction of the same component j in the liquid phase, $x_j$ : $K_j = rac{y_j}{x_j}$. It is significant in calculating the phase behavior of a system and the composition of each phase.</p> Signup and view all the answers

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