5378318
Description
Flashcards by anshika gupta, updated more than 1 year ago
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Created by anshika gupta
about 8 years ago
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| Question | Answer |
| Define the kinetic particle theory | The kinetic particle theory states that all matter is made up of tiny particles and that these particles are in constant random motion |
| Why does solid have a fixed shape | ☆ particles are closely packed in orderly manner ☆held together by very strong forces of attraction ☆ have enough kinetic energy to only vibrate and rotate about their fixed positions ☆ cannot move freely |
| Why solid has a fixed volume | Solid cannot be compressed as particles are already very close together |
| why is liquid does not have a fixed shape | ☆ disorderly manner ☆ weaker of attraction than particles of solid ☆ more kinetic energy then particles of same substance in solid-state and are not held in fixed position ☆ move freely throughout the liquid |
| why liquid has a fixed volume | ♡particles of liquid are farther away from one ♡Another liquid particles are packed closely together next ♡Thus liquid cannot be compressed |
| why gas does not have a fixed shape | ♧ Particles spread far apart from one another ♧ weaker forces of attraction ♧ a lot of kinetic energy & not held in fixed position ♧ move about rapidly in any direction |
| gas no fixed volume | ● particles with a lot more space in between them ● large space between the particles allow the gas to be easily compressed when pressure is applied ● gas can be forced to move closer together ● hence gas can be compressed |
| diagram of gas being compressed | |
| Short summary | |
| what happens to particles of solid when he did up until it melts | |
| conducting a melting experiment | |
| heating curve | |
| particles cooled till it freezes | |
| cooling curve | |
| particles when boiling | |
| heating curve | |
| what is evaporation | ♡ process by which a liquid changes to gas at temperatures lower than its boiling point --> VOLATILE LIQUID( liquids that evaporate quickly at room temperature) |
| what is condensation | ♤ process by which a gas changes to a solid or liquid ♤ condensation is the reverse of boiling heat energy is given out by gas particles during condensation, as temperature drops gas particles lose energy and move more slowly eventually movement of particles become slow enough for gas to change to liquid |
| what is sublimation | ♧process by which a solid changes directly to a gas without going through the liquid state ♤ it's okay because particles at the surface of solid has enough energy to break away from solid and Escape as gas ammonium chloride and iodine as examples |
| diffusion experiment | |
| gases with lower molecular mass diffuse faster than those with higher molecular mass | |
| steps on describing previous experiment | 1. state gases 2. state molecular mass 3. which one will go where 4. where we went be formed |
| definition of diffusion | movement of particles from a region of higher concentration to a region of lower concentration |
| why the higher the temperature the higher the rate of diffusion | particles gain more energy as temperatures increase. They can move faster and this increases the rate of diffusion |
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