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.3.5 Kinetic Theory of Gases – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Which is NOT an assumption of the kinetic model of an ideal gas?
Collisions are elastic
Molecules exert attractive forces on each other at long range
Molecule volume is negligible
Molecules move randomly
2.
Why does the pressure of a gas rise when it is heated at constant volume?
There are more molecules
Molecules get larger
Molecules move faster and hit the walls harder and more often
Intermolecular forces increase
3.
If the temperature of a gas rises, the peak of the speed-distribution graph
moves left
splits
stays still
moves right and the curve flattens
4.
A gas has density 0.90 kg m−3 and ⟨c2⟩ = 3.0 × 105 m2 s−2. Its pressure is
9.0 × 104 Pa
2.7 × 105 Pa
1.4 × 105 Pa
9.0 × 105 Pa
5.
At the same temperature the rms speed of helium (M = 4) compared with that of argon (M = 40) is larger by a factor of about
1.0
10
100
3.2
6.
In a collision with a wall, a molecule of mass m and perpendicular speed vx rebounds elastically. The momentum change of the molecule is
mvx
2mvx
0
½mvx
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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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