How Well Do You Know Your Thermal Analyis & Calorimetry Facts?

20 Questions | Total Attempts: 420

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How Well Do You Know Your Thermal Analyis & Calorimetry Facts?

Welcome to our first Calorimetry and Thermal Analysis Quiz. We have designed this quiz just for some fun, and it contains some easy questions, some tough questions and of course some trick questions. There is no pass and fail rate, but we encourage you to have a go. . . . And to enjoy it. We will award a small prize after the quiz has run for a while. Because of the trick questions we do not expect anyone to get them all right. . . . Not by a long shot. However, you will be asked for your email address, and contact details. These WILL NOT be used for promotion, just to contact you with the results of the quiz (and the correct answers). We encourage you to submit your response - because as I said we are not expecting anyone to get them all right.


Questions and Answers
  • 1. 
    Who discovered the thermo electric effect that is applied in thermocouples, widely used in most of the existing thermoanalyzers?
    • A. 

      Thomas Edison (1847 – 1931)

    • B. 

      Thomas Johann Seebeck (1770 – 1831)

    • C. 

      Albert Einstein (1879 – 1955)

    • D. 

      André-Marie Ampère (1775-1836)

  • 2. 
      Who developed the DSC technique?
    • A. 

      E.S. Watson and M.J. O'Neill in 1960

    • B. 

      A. Tian and E. Calvet in 1947

    • C. 

      S. Thelma and G. Louise in 1991

    • D. 

      G. Wolf and J. Lechner in 1985

  • 3. 
    What is the particularity of these calorimeters?
    • A. 

      The one on the right side supported the Dutch team at the 2010 FIFA Soccer World Cup in South Africa

    • B. 

      The one on the left side grew old and had to be equipped with a wheeled walker

    • C. 

      They survived from fire in a lab

    • D. 

      They were designed after some dada artwork from early 20th century

  • 4. 
    What is represented on the following picture?
    • A. 

      The first multi-function cooking robot ever invented

    • B. 

      The first calorimeter ever invented

    • C. 

      The first artificial earth satellite ever sent to space

    • D. 

      Some dada artwork from early 20th century

  • 5. 
    What is represented on the following picture?
    • A. 

      The first multi-function cooking robot ever invented

    • B. 

      The first calorimeter ever invented

    • C. 

      The first artificial earth satellite ever sent to space

    • D. 

      Some dada artwork from early 20th century

  • 6. 
    How did Antoine Lavoisier, co-inventor of the first experimental calorimeter, end his life?
    • A. 

      He had a heart attack while “staying” at his mistress’s place

    • B. 

      He died accidentally during the explosion of an uncontrolled combustion experimental set-up

    • C. 

      He was branded a traitor by French Revolutionists and executed by Guillotine

    • D. 

      He joined the French Revolutionists side and died during the Storming of the Bastille

  • 7. 
    DSC section   DSC means Differential Scanning Calorimetry. What is the advantage of a “differential” calorimeter?
    • A. 

      It compensates from the heat effects linked with sample holders

    • B. 

      It reduces the calorimetric signal background noise

    • C. 

      It makes a big difference…

    • D. 

      It improves the calorimeter furnace temperature control

  • 8. 
    Among the calorimetry measurement principles that are represented below, which one corresponds to the Calvet principle?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 9. 
    How could I improve the separation of the following three exothermic peaks?
    • A. 

      By increasing the temperature scanning rate and increasing the sample mass

    • B. 

      By decreasing the temperature scanning rate and increasing the sample mass

    • C. 

      By increasing the temperature scanning rate and decreasing the sample mass

    • D. 

      By decreasing the temperature scanning rate and decreasing the sample mass

  • 10. 
      In the following glass transition determination thermogram, the signal deviates a lot, potentially leading to an error in the Tg determination. Approximately how much alumina should be placed in the reference crucible to shift the baseline to 0mW and thus improve the signal deviation?   Heating rate: 10 K/min Heat capacity of alumina at 50°C: 0.83J.g-1.K-1
    • A. 

      2 mg

    • B. 

      10 mg

    • C. 

      100 mg

    • D. 

      200 mg

  • 11. 
    The DSC thermogram below corresponds to the heating of a cocoa butter sample under air after a first melting and consecutive fast cooling to -10°C. How to interpret the successive endothermic, exothermic, and endothermic peaks?
    • A. 

      The tested sample contains impurities that melt, then form a solid solution in the main compound, which melts quickly afterwards

    • B. 

      First cooling caused the formation of a metastable form that melts, immediately crystallizes into thermodynamically stable form, that quickly melts

    • C. 

      During melting, cocoa butter is oxidized by air, leading to an exotherm. The thermogram is actually the sum of one endotherm and one exotherm

    • D. 

      During melting, cocoa butter overflowed the crucible, and was spilled on the DSC sensor, leading to an odd signal

  • 12. 
    What is the mistake in the following DSC protocol?
    • A. 

      There is not enough hexane to record its critical point

    • B. 

      There will be an overpressure due to hexane vapour pressure and it will explode

    • C. 

      Hexane will react with oxygen from air, decompose, produce gases, and the crucible will explode

    • D. 

      Nothing will happen with hexane on that temperature range, so this experiment is pointless

  • 13. 
    TGA section   Buoyancy effect   A well known source of error in TGA is  linked with buoyancy effect: when the temperature of the gas surrounding the sample changes, its density changes and the amplitude of the sample buoyancy force changes. As a consequence, the TGA system records a fake mass uptake (drift). What other effect, mainly observed at high temperatures, is also a source of TGA baseline drift ?
    • A. 

      Change of viscosity of the gas

    • B. 

      Change of thermal conductivity of the gas

    • C. 

      Change of density of the sample

    • D. 

      Climate change

  • 14. 
    Thermal analysis techniques measure a parameter as a function of time and temperature. TGA measures sample weight, DSC measures heatflow … What does a Sievert’s instrument measure?
    • A. 

      The radiations emitted by a sample

    • B. 

      The sievertness of the sample

    • C. 

      The volume of a sample

    • D. 

      The pressure drop linked to gas sorption on a sample

  • 15. 
    What coupled technique would be the best fit to study the desorption of the following gases from a zeolithe?
    • Carbon dioxide (C02)
    • Ammonia (NH3)
    • Nitrogen dioxide (N02)
    • Nitrous oxide (N20)
    • A. 

      TGA-DSC

    • B. 

      TGA-MS

    • C. 

      TGA-YMCA

    • D. 

      TGA-FTIR

  • 16. 
    How many water molecules per metal sulphate (MeSO4) molecule are lost by the sample in the tested temperature range? In other words, what is the value of x in the reaction below?  
    • A. 

      ½

    • B. 

      1

    • C. 

      2

    • D. 

      4

  • 17. 
      There is a mistake in the following protocol. What will happen?   The sample is heated to 1100°C under inert atmosphere, then is switched to air. Tempearature is kept at 1100°C during a 24 hours oxydation isotherm.
    • A. 

      Platinum suspensions will oxidize at the same time than the SiC samples

    • B. 

      SiC will never oxidize

    • C. 

      Platinum will melt and the sample will fall at the bottom of the furnace

    • D. 

      Silicium will form an eutectic with platinum, melt, and fall in the furnace bottom

  • 18. 
    General section   The specific heat of water at 15°C is 4.18J.g-1.K-1. What is the specific heat of water at 15°C in Btu.pound-1.°F-1 ?
    • A. 

      1 Btu.pound-1.°F-1

    • B. 

      2.89 Btu.pound-1.°F-1

    • C. 

      8.31 Btu.pound-1.°F-1

    • D. 

      Who cares? Btu, pounds, and °F aren’t international system units!

  • 19. 
    Among the thermodynamic systems described below, which corresponds to the isoperibolic one?
    • A. 

      TE is constant and TS is variable

    • B. 

      TE = TS

    • C. 

      TE is variable and TS is constant

    • D. 

      TE = T0 + βmt + AT.sin (w.t)

  • 20. 
    What is the meaning of the term “accuracy”?
    • A. 

      Accuracy relates the agreement between the measured concentration and the « true » value

    • B. 

      A quantity referring to the differences between the mean of a set of results or an individual result and the value which is accepted as the true or correct value for the quantity measured

    • C. 

      The nearness of a result or the mean of a set of results to the true value

    • D. 

      All of the above, they are definitions of accuracy from different sources