Matematika.Fisika.KimiaJadiMudahdanMenyenangkan
Syafana
Formative Test Paket 1
Kinetic Particle Theory
1. C
2. A
3. B
4. B
5. D
Chemistry
VII
6. D
7. D
8. C
9. C
10. C
Pembahasan:
11. (a) gas
(b) solid
(c)
12. (a) The particles in a liquid are closely packed. However, the particles are not held in fixed
position. The particles cannot ne compressed but they can slide over one another.
(b) Ice is a solid. The particles are closer together than in watewr vapour, giving it a higher
density. In water vapour the particles are much further away from each other, giving it a very low
density. (1 g ice = 1.09 cm3, 1 g water = 1cm3, 1 g water vapour = 1333 cm3)
13.
14. (a) sublimation occurred. The mothball must be made of substance that sublimes.
(b) the volatile alcohol evaporated by absorbing heat from the skin.
15.
Heat taken in
Melting, evaporation, boiling, sublimation
Heat given out
Condensation, freezing
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