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.4.4 Calculating Changes in Entropy – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Heat of 1200 J enters a body at constant temperature 300 K. Its entropy change is
−4.0 J K−1
0.25 J K−1
3.6 × 105 J K−1
4.0 J K−1
2.
A hot reservoir at 500 K loses 1000 J to a cold reservoir at 250 K. The total entropy change is
−2.0 J K−1
+4.0 J K−1
+2.0 J K−1
0
3.
The entropy change of a system that loses heat reversibly at a constant temperature is
positive
negative
zero
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4.
The entropy change for 2.0 kg of water boiling at 373 K (L = 2.26 × 106 J kg−1) is approximately
1.2 × 104 J K−1
1.2 × 106 J K−1
4.5 × 106 J K−1
6.1 × 102 J K−1
5.
Why is the entropy change of the universe positive when heat flows from hot to cold?
Temperature is conserved
Energy is created
The cold body gains more entropy than the hot body loses
The hot body gains entropy
6.
The entropy of an ideal gas increases by 5.8 J K−1 in an isothermal expansion at 300 K. The heat absorbed is approximately
19 J
1.7 × 103 J
5.8 J
1.7 J
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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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