The Physics of Thermodynamics

21 Questions covering topics 3.4 to 3.6 of the HL physics syllabus. Requires knowledge of the thermodynamics of a gas as well as the equations which define their possible transformations and changes in entropy.

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1. Absolute zero is the theoretical temperature at which...?

  • The temperature at which Hydrogen freezes
  • The kinetic energy of the molecules of gas is infinitely large
  • The kinetic energy of the molecules of gas is zero
  • Is the temperature at which water freezes
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2. The Kelvin and Celsius scales measure the same intervals in temperature

  • True
  • False

3. The conversion factor from Kelvin to Celsius is +273.

  • False
  • True

4. The equation which defines the state of a gas is...? (Where P is pressure in (kPa), V is volume (m^3), T is temperature (K) R is a constant and n is the number of mols of gas (mol))

  • PVn = RT
  • (PR)/(VT) = n
  • (PV)/(RT) = n
  • P = VnRT

5. The relationship between pressure and volume at a constant temperature is...

  • Inversely proportional
  • Proportionally related
  • Not linearly related
  • Linearly related
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Comments

Mrs Jones

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A great resource thank-you - and a very good test of your recall and understanding.

I suggest printing out the flash cards and adding your own graphs. (from your teacher notes or textbook)

Teacher Top Tip - add the work done is the area enclosed (colour it in to make you remember) on the Carnot cycle pressure-volume graph for an ideal gas.

Check your understanding by doing the quiz.  A scrap of paper and pencil will be useful while doing the quiz to sketch graphs and rearrange equations.

To avoid the "easy mistake to make" - Put degrees celsius and kelvin on the same axes (line drawn across the page) when you need to convert so as not to be caught out

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