IB Physics SL B 1 1 Molecular States Questions

Practise comparing solids, liquids and gases through particle spacing, motion, forces, density and energy in exam questions.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • compare solids, liquids and gases using particle spacing, motion, intermolecular forces and energy
  • explain density differences between states from the relative spacing and packing of their particles

IB Physics SL B 1 1 Molecular States Questions question 1

[Maximum number: 2]

A cylindrical cork of height H and cross-sectional area A is floating stationary in water. Its depth below the water surface is D.

Figure for Question IB Physics SL B 1 1 Molecular States Questions question 1 — IB Physics SL

Explain why the density of most substances in a solid state is larger than its density in a liquid state.

Water shows an anomaly with respect to what is stated in (c)(i).
Graph 1 shows the variation with temperature of the density of water between 100C-100^{\circ} \mathrm{C} and 100C100^{\circ} \mathrm{C}. Graph 2 shows the same graph enlarged for the range 0 to 10C10^{\circ} \mathrm{C}.

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