SEPA (MIDTERMS) LESSON 1: Separation Processes
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Questions and Answers

What is the main goal of separation processes?

  • Creating a mixture of different substances
  • Combining substances into one product
  • Transforming a single substance into multiple products
  • Isolating components to purify a solution (correct)

    • How are separation processes defined?

  • Maintaining the original composition of a mixture
  • Converting a mixture of substances into two or more products with different compositions (correct)
  • Transforming a mixture into products with identical compositions
  • Combining substances into a single product mixture

    • What is the goal of distillation in crude oil reforming?

  • Reacting small hydrocarbon molecules to create larger ones
  • Modifying the structure of medium-sized hydrocarbons
  • Breaking apart very large hydrocarbon molecules
  • Separating chemical components based on volatility (correct)

    • What distinguishes the focus of chemists from that of chemical engineers in terms of separation methods?

    <p>Chemists utilize analytical separation methods, while engineers are more concerned with large-scale separation methods</p> Signup and view all the answers

    Which separation technology involves breaking apart very large hydrocarbon molecules?

    <p>Fluid catalytic cracking</p> Signup and view all the answers

    Why are separations like enrichment, purification, and concentration important to chemists and chemical engineers?

    <p>To purify solutions and achieve different product mixtures</p> Signup and view all the answers

    What is the primary purpose of separation processes?

    <p>To isolate and obtain pure components from a mixture</p> Signup and view all the answers

    What is the role of a mass-separating agent (MSA) in separation operations?

    <p>To create a new phase that is immiscible with the original mixture</p> Signup and view all the answers

    Which of the following is a disadvantage of using a mass-separating agent (MSA) in separation processes?

    <p>All of the above</p> Signup and view all the answers

    In what situations can partial condensation or vaporization be used as a separation technique?

    <p>When the feed mixture contains species that differ widely in their tendency to condense or vaporize</p> Signup and view all the answers

    What is the primary difference between using an energy-separating agent (ESA) and a mass-separating agent (MSA) in separation processes?

    <p>ESAs are generally preferred over MSAs due to their simplicity and efficiency</p> Signup and view all the answers

    Which of the following is an example of an energy-separating agent (ESA) used in separation processes?

    <p>Heat transfer used to separate hydrogen and nitrogen from ammonia</p> Signup and view all the answers

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