Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.4.5 Second Law of Thermodynamics – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Which statement is a form of the second law of thermodynamics?
Energy is always conserved
Heat cannot flow spontaneously from a cold body to a hot body
Pressure is proportional to temperature
Work equals force × distance
2.
A process in which ΔSuniverse = −2 J K−1 is
possible and irreversible
possible and reversible
impossible
a free expansion
3.
A freezer lowers the entropy of its contents. This is allowed because
the first law forbids it
the total entropy is constant
the second law does not apply to freezers
the room's entropy increases by more
4.
An engine could be 100% efficient only if it
rejected no heat to a cold reservoir, which the second law forbids
had no friction, which is possible
used a gas with the highest specific heat
ran at high speed
5.
An engine takes 1200 J from a reservoir at 400 K and rejects 600 J to one at 200 K. The total entropy change of the universe per cycle is
−3.0 J K−1
+3.0 J K−1
+6.0 J K−1
0
6.
Which process is reversible in the ideal limit?
Heat flow across a large temperature difference
A very slow isothermal expansion in equilibrium with a reservoir
Sudden free expansion of a gas
Friction between two surfaces
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Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
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