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Temperature Scales: Flashcards

Revise converting between °C, °F and K, reference temperatures and where Celsius equals Fahrenheit.

10 cardsBeginner

10 cards

  1. Question
    How do you convert °C to °F?
    Answer

    Multiply by 9/5 (1.8), then add 32: TF=95TC+32T_\text{F} = \tfrac{9}{5}T_\text{C} + 32

  2. Question
    How do you convert °F to °C?
    Answer

    Subtract 32, then multiply by 5/9: TC=59(TF−32)T_\text{C} = \tfrac{5}{9}(T_\text{F} - 32)

  3. Question
    How do you convert °C to K?
    Answer

    Add 273.15: TK=TC+273.15T_\text{K} = T_\text{C} + 273.15

  4. Question
    At what temperature are the Celsius and Fahrenheit readings equal?
    Answer

    −40: −40 °C = −40 °F

  5. Question
    What are the freezing and boiling points of water (1 atm) in °C, °F and K?
    Answer

    Freezing: 0 °C = 32 °F = 273.15 K. Boiling: 100 °C = 212 °F = 373.15 K.

  6. Question
    What is absolute zero in K, °C and °F?
    Answer

    0 K = −273.15 °C = −459.67 °F

  7. Question
    Convert 25 °C to °F.
    Answer

    (9 °F/5 °C)(25 °C) + 32 °F = 77 °F

  8. Question
    Why is the factor 9/5?
    Answer

    Between freezing and boiling water there are 180 °F but only 100 °C: 180/100 = 9/5.

  9. Question
    A temperature rises by 10 °C. What is the rise in K and in °F?
    Answer

    10 K and 18 °F (no offset for changes).

  10. Question
    Is it correct to write 300 °K?
    Answer

    No. Kelvin has no degree sign: write 300 K.