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Worksheets4. Prs Modelling - EOS, Transport Eq and Chemical Equilibria
Total questions: 10
Worksheet time: 7mins
Considering a reversible reaction shown in the figure, when does chemical equilibrium occurs?
After all of the reactant has turned to products
Conversion of reactant to product is 100%
Difference between chemical potential of product and reactant becomes zero
No reaction occurs in the reactor
Which statement is TRUE about the equilibrium constant, Kp
Kp is the equilibrium ratio of reactant to product
Kp is a function of pressure
Kp is the equilibrium ratio of product to reactant
Kp is a function of flowrate
Phase equilibrium is a fundamental knowledge for a chemical engineering that are applicable in most separation processes.
When does a phase equilibrium is achieved.
When same component co-exist in solid liquid and vapor phase.
When the chemical potential of the different component at 2 different phase is achieved
When the mass fraction of liquid and vapor of the same component is at the same value.
When the chemical potential of the same component at 2 different phase is achieved
Determine the INCORRECT case for the respective bubble point or dew point calculation.
Bubble point calculation:
Known P and x, calculate T and y
Dew point calculation
Known x and y, calculate T and P
Dew point calculation
Known T and y, calculate P and x
Bubble point calculation:
Known T and x, calculate P and y
For an ideal vapor and liquid phase behavior, Dalton's Law and Raoult's Law is applicable where yj PT =xj Pjs . Select the TRUE statement about the equation.
y and x are the mass fraction for of the same species at vapor and liquid phase respectively
PT is the partial pressure of the component
PjS is the vapor partial of component j
PjS can be calculated using Antoinne's equation
Select the CORRECT statement about relative volatility, α
Relative volatility is determine based on the composition of liquid phase only
α = KjKi
Relative volatility is compared between the less volatile to the more volatile compound
Relative volatility is comparing the volatility of the same component at different temperature
Determine the FALSE statement regarding Activity Coefficient, γ .
For vapor-liquid system in non-ideal solution estimation, utilization of Activity coefficient is adequate
γ = 1 if the liquid are behaving ideally
Sample of non-ideal solutions are ionic solutions and electrolytes.
Activity Coefficient is the correction factor in Raoult's law for non-ideal liquid
Consider an Arrhenius equation as shown below and select the FALSE statement.
k = α exp (−RTEa)
T is referring to the reaction tempeature
All temperature units can be used for the Arrhenius equation calculation
Ea is the activation energy for the reaction.
R is a ideal gas constant
Overall reaction rate (R), is applicable to all system be it in a reversible or irreversible process. For the chemical equation stated below, select the CORRECT R for the respective component. Given that k is the specific reaction rate for the reaction below is an elementary reaction
3A + 2B → C
R= k CA2 CB2
R= k CA CB
R= k CA3
R= k CA3 CB2
Select the CORRECT statement for dimension of Overall Reaction Rate (R) and specific reaction rate (k)
dimension for R is changing according to the order of reaction
dimension for R is always moles/time.volume
operating temperature and pressure affected to unit for R and k
dimension of k always moles/time.volume
