Objective
(100 points) Create and solve an energy balance problem involving a two-component evaporation process where:
A liquid mixture enters the evaporator
Two streams exit at equilibrium (one vapor, one liquid). The exit streams must contain both components.
Process occurs at constant pressure
Component Selection
Component 1 (choose one): Acetone, Benzene, or Toluene
Component 2 (choose one): Ethanol, Methanol, or n-Pentane
Problem Statement Requirements
Must include:
Input stream specifications:
Mole fractions
Temperature
Pressure
Output stream specifications:
Temperature
Pressure
Indirect information to determine input molar flow rate
Exit streams must have unknown:
Flow rates
Mole fractions
Prompt questions in an order that helps the student solve for all unknowns in the problem.
Temperature constraints:
Must NOT equal normal boiling points of either component
Must require use of Raoult's law and Antoine equation for both components
Required Data Sources
Heat capacity data:
zyBooks Table 9.11 OR
FRR Table R. 7
Heat of vaporization:
zyBooks Table 9.5.2 OR
FRB Table B. 1
Solution Requirements
Flow Diagram
Completely labeled diagram showing for each stream:
Molar flow rate
Mole fractions
Temperature
Pressure
Phase
Detailed Solution Steps
All equations used
Clear solution methodology
Hypothetical process paths
Enthalpy calculations for each component
The following illustrates the detail that should be shown in the solution. The actual calculations of the
\int C_(P)dT terms should be completed in Excel
C_(6)H_(14) vapor in: liquid, 0\deg C-> liquid, 68.74\deg C-> vapor, 68.74\deg C-> vapor, 75\deg C
widehat(H)_(C_(6)H_(14)( vap ) in )=\int_(0\deg C)^(68.74\deg C) C_(P, liquid )dT+\Delta widehat(H)_(v)+\int_(68.74\deg C)^(75\deg C) C_(P, vapor )dT
hat(H)_(C_(6)H_(14)(vap)in)=14.87+28.85+1.04=44.76k(J)/(k)g
