p14 Flashcards
describe the particles in a solid
touching and vibrating
give two properties of solids
they keep the shape and usually cannot be compressed
describe the particles in a liquid
touching and moving past each other
give three properties of liquid
They flow, take the shape of the container and cannot usually be compressed
describe the particles in a gas
far apart and moving round quickly
give two properties of gases
they are compressible and expand to fill their container
what is kinetic theory?
everything is made from tiny particles
what holds the particles in a solid closely together?
Force of attraction
what equipment where do you need to find the density of a liquid?
beaker, balance, measuring cylinder
what equipment would you need to find the density of an irregular shaped solid
balance, measuring cylinder, displacement can
what is it called? When a gas turns into a liquid?
condensing
what is it called? When a solid turns straight into a gas?
sublimation
what is true about mass during changes of state?
mass is condseved
are Changes of state, physical changes or chemical changes
physical changes
why are changes of state physical processes?
The material recovers its original properties if the change is reversed
what happens if you heat a system?
The energy stored within the system will change and raise its temperature or produce changes of state
define specific heat capacity
The amount of energy it takes to increase the temperature by 1 kg of a substance by 1 degree
define specific latent heat
The amount of energy it takes to make 1 kg of a substance changes state
what is the purpose of thermal insulation?
reducing unwanted energy transfers
what equipment is needed to obtain a temperature time graph for melting ice
boiling tube, thermometer,beaker, tripod, gauze , kettle, Bunsen burner, stop clock
what is the pressure of a gas due to?
forces on the wall of a container caused by the moving particles, setting the walls
what happens to the pressure produced by fixed mass of gas at constant volume of temperature increases and why?
it increases because the velocity of the particles increase
what is true about particles at absolute zero
they are not moving
how do you convert from Kelvin to Celsius?
subtract, 273
