Zadanie 1
Dark crystals of iodine form on a cold glass surface placed in warm iodine vapour. No liquid is seen at any stage. What is the name of this change of state? A. Deposition B. Sublimation C. Condensation D. Freezing
Kinetic molecular theory and states of matter
Use the kinetic molecular theory to describe particle arrangement and motion in solids, liquids and gases, name each change of state (melting, freezing, vaporization, condensation, sublimation, deposition) and write state symbols (s), (l), (g) and (aq) in chemical equations.
Tę umiejętność sprawdza 11 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 11 Otwórz w wyszukiwarce z filtrami
Zadanie 1
Which equation represents the condensation of bromine? A. Br2(g) → Br2(l) B. Br2(l) → Br2(g) C. Br2(l) → Br2(s) D. Br2(s) → Br2(g)
Zadanie 2a
Iodine crystals, I2(s), were sealed in a flask and left until an equilibrium was reached with violet vapour above the crystals. I2(s) ⇌ I2(g) (i) Name the change of state from I2(s) to I2(g) and state the type of force between…
Zadanie 2
The kinetic molecular theory describes matter as particles in constant motion. State and explain two physical properties of a gas using this model.
Zadanie 1
Which term describes the change of state shown in the equation below? I2(s) → I2(g) A. Deposition B. Melting C. Evaporation D. Sublimation
Zadanie 1g
Hot tubs are usually kept at 38–40 °C. Suggest two reasons why running a hot tub at a lower temperature would be better for the environment.
Zadanie 1a
The graph shows the boiling points of the straight-chain alkenes with a terminal double bond, from ethene to hex-1-ene. (i) Explain why the boiling point rises from ethene to but-1-ene. (ii) A sample of but-1-ene is warmed from 250 K to 300 K at constant…
- Materiał graficzny
Zadanie 1
Lead(II) bromide is electrolysed in the molten state at 400 °C. Lead melts at 327 °C and lead(II) bromide melts at 371 °C; bromine boils at 59 °C. Which is the correct equation for the overall reaction? A. PbBr2(l) → Pb(l) + Br2(g) B.…
Zadanie 1a
Outline why a large number of the elements in the table have atomic volumes above 10 000 cm3 mol−1.
Zadanie 4
Which equation represents the sublimation of naphthalene, C10H8? A. C10H8(l) → C10H8(g) B. C10H8(s) → C10H8(l) C. C10H8(g) → C10H8(s) D. C10H8(s) → C10H8(g)
Zadanie 2
Iodine crystals placed in a warm flask turn directly into purple vapour without forming a liquid. Which term describes this change of state? A. Boiling B. Evaporation C. Deposition D. Sublimation