BThey are close together and slide past one another.[1]
Liquid particles are closely packed in a disorderly way and slide past one another.
Ccondensation[1]
In condensation the particles lose energy and come closer together. Melting, boiling and sublimation all absorb energy.
BThe particles of a gas are far apart, with a lot of empty space between them.[1]
A gas can be squeezed because its particles are far apart. The particles of a liquid are already touching.
BPerfume particles move randomly and spread from a higher to a lower concentration.[1]
This is diffusion: the net movement of particles from a region of higher concentration to a region of lower concentration.
In a solid the particles are very closely packed in an orderly arrangement, but in a gas they are very far apart in a disorderly arrangement. [1]
In a solid the particles vibrate and rotate about fixed positions, but in a gas they move quickly and randomly in any direction. [1]
Accept the other differences from the lesson, such as kinetic energy or forces of attraction.
The energy absorbed is used to overcome the forces of attraction between the particles. [1]
It is not used to increase the kinetic energy of the particles, so the temperature stays the same. [1]
The particles gain energy and vibrate more quickly. [1]
They move slightly further apart, so the solid expands. [1]
Ca substance diffusing through a liquid[1]
Movement from a higher to a lower concentration is diffusion. The words "very slowly" show that it is through a liquid, because gas particles move rapidly.
DEvaporation only occurs at room temperature, while boiling only occurs at the boiling point.[1]
Evaporation can occur at any temperature, not only at room temperature.
B3 to 1[1]
Sublimation is a solid changing straight to a gas. Diagram 3 is the solid and diagram 1 is the gas.
D59 °C[1]
L is a liquid at 25 °C, so its boiling point must be above 25 °C.
BThe carbon dioxide particles become far apart.[1]
0 °C is above −78 °C, so the solid carbon dioxide turns into a gas and its particles become far apart.
Argon and carbon dioxide. [1]
Particles close together in an orderly arrangement, with at least 3 by 3 particles. [1]
Nitrogen is a solid at −300 °C, because this is below its melting point of −210 °C.
The particles change from sliding past one another to moving rapidly in any direction. [1]
The particles change from being close together and disorderly to being far apart and disorderly. [1]
Oxygen boils at −183 °C, so it changes from a liquid to a gas.
100 °C [1]
250 °C [1]
Solid [1]
Solid and liquid [1]
Gas [1]
As the temperature increases, the particles gain energy [1] and move faster. [1]
When the temperature is high enough, the particles have sufficient energy to overcome the forces of attraction. [1]
The particles are spread far apart and can move about rapidly in all directions. [1]
The mistake is in methane. [1]
The lower the relative molecular mass, the faster the rate of diffusion. Methane has a lower relative molecular mass than carbon monoxide and nitrogen, so it should diffuse in less than 32 s, but the data shows 35 s. [1]
Ammonia is soluble in water. [1]
The molecules are closely packed in a disorderly (irregular) manner [1]
and slide past one another. [1]