text: SolutionHW_10
  
  # SolutionHW_10 - Homework Set #10: Due date: 12/04/06, by...
  
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  Homework Set #10: Due date: 12/04/06, by 11:00 am. Problem # 1: Recall the example of evaporation of component A contained in a test tube. (a) By neglecting the convective flux of component A, show that this leads to () 1 12 21 AA zz cD Nx = =− A x (b) What error (in percentage) is made in the determination of D in the example 18.2-2 in BSL if the result in (a) is used? Answer: a. Without the convection term, the total molar flux of A is equal to the diffusion flux of A. For steady state ` Since c and D are constant, thus ( ) . A x x dx const dz z z == Therefore, 1 cD = A x b. Error in the determination of D in the example 18.2-2 To get the solution of Example 18.2-2 by using the result in (a), we make the following calculation with the help of the equation of state for an ideal gas. ( )( )( )( ) ( ) 9 2 7.26 10 82.06 273 17.1 0.0641 / / / 755/760 33/755 0 Az Az NR T N Dc c dx dz p dx dz × = = −− ⎡⎤ ⎣⎦ m s Hence the error is % 79 . 0 100 0636 . 0 0636 . 0 0641 . 0 = ×
  
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  Problem # 2: It is desired to alter the wettability of a formation from the initial oil wet to the water wet because the relative permeability to oil is significantly higher for more water-wet rock. One of
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  ## This note was uploaded on 12/14/2011 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas at Austin.
  
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  SolutionHW_10 - Homework Set #10: Due date: 12/04/06, by...
  
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explanation: The provided text is a solution set for a homework assignment (Homework Set #10) with a due date of 12/04/06. It contains solutions to two problems. 
  
  - **Problem #1** involves a question about the evaporation of component A in a test tube, with a part (a) asking to show a specific equation and part (b) asking to calculate the percentage error in determining a diffusion coefficient. The solution for both parts is provided.
  - **Problem #2** discusses altering the wettability of a formation from oil-wet to water-wet to increase the relative permeability to oil. The problem statement is given, but the solution is not fully provided in the text.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: SolutionHW_10
  
  # SolutionHW_10 - Homework Set #10: Due date: 12/04/06, by...
  
  This preview shows pages 1–3. Sign up to view the full content.
  
  Homework Set #10: Due date: 12/04/06, by 11:00 am. Problem # 1: Recall the example of evaporation of component A contained in a test tube. (a) By neglecting the convective flux of component A, show that this leads to () 1 12 21 AA zz cD Nx = =− A x (b) What error (in percentage) is made in the determination of D in the example 18.2-2 in BSL if the result in (a) is used? Answer: a. Without the convection term, the total molar flux of A is equal to the diffusion flux of A. For steady state ` Since c and D are constant, thus ( ) . A x x dx const dz z z == Therefore, 1 cD = A x b. Error in the determination of D in the example 18.2-2 To get the solution of Example 18.2-2 by using the result in (a), we make the following calculation with the help of the equation of state for an ideal gas. ( )( )( )( ) ( ) 9 2 7.26 10 82.06 273 17.1 0.0641 / / / 755/760 33/755 0 Az Az NR T N Dc c dx dz p dx dz × = = −− ⎡⎤ ⎣⎦ m s Hence the error is % 79 . 0 100 0636 . 0 0636 . 0 0641 . 0 = ×
  
  This preview has intentionally blurred sections. Sign up to view the full version.
  
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  Problem # 2: It is desired to alter the wettability of a formation from the initial oil wet to the water wet because the relative permeability to oil is significantly higher for more water-wet rock. One of
  This is the end of the preview. Sign up to access the rest of the document.
  
  ## This note was uploaded on 12/14/2011 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas at Austin.
  
  ### Page1 / 3
  
  SolutionHW_10 - Homework Set #10: Due date: 12/04/06, by...
  
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distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The provided text is a solution set for a homework assignment (Homework Set #10) with a due date of 12/04/06. It contains solutions to two problems. 
  
  - **Problem #1** involves a question about the evaporation of component A in a test tube, with a part (a) asking to show a specific equation and part (b) asking to calculate the percentage error in determining a diffusion coefficient. The solution for both parts is provided.
  - **Problem #2** discusses altering the wettability of a formation from oil-wet to water-wet to increase the relative permeability to oil. The problem statement is given, but the solution is not fully provided in the text.
  
  Label: question-and-answer