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)
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 9 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 9 Otwórz w wyszukiwarce z filtrami
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
Some users have asked for the water to be heated in winter. Suggest two reasons why leaving the water unheated is the better choice for the environment.
Zadanie 1
What happens as a pure molecular solid, such as solid ammonia, melts at its melting point? I. The temperature of the sample stays constant. II. The energy absorbed is used to partly overcome the forces between the particles. III. Covalent bonds within the…
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 1a
Outline why a large number of the elements in the table have atomic volumes above 10 000 cm3 mol−1.
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