Particles And Density Flashcards
what is the equation for density
Density = mass/volume
density is the amount of ________ in a given volume
mass
how do you measure the density of a regular shape
Find the volume by doing: bxhxw
Then measure the mass using the digital balance
Divide the mass by the volume and that will equal the density
how do you measure the density of a irregualr object
Measure the mass on a digital balance
Fill up a eureka can with water until it reaches the spout
Place a measuring cylinder under the spout of the eureka can
Tie the irregular object to a piece of string, put the irregular object inside the eureka can
You should see the water flow into the measuring cylinder, wait until the drips of water have stopped
Finally measure the amount of water in the measuring cylinder, that is the volume of the irregular object
Now you have the mass and volume. Do this equation: Density=mass/volume
what are the qualties of a solid
rigid fixed volume fixed shape cannot be compressed not much energy particles can only vibrate bo ability to flow
what are the qualities of a liquid
not rigid no fixed shape fixed volume more energy than a solid but less than a gas ability to flow moves freely cannot be squashed
what are the qualities of a gas
not rigid no fixed shape no fixed volume can be squashed no ability to flow random movement of particles the most energy out of the states of matter
what is a solid to a liquid
melting
what is a liquid to a gas
boiling/evaporation
what is a gas to a liquid
condensation
what is a liquid to a solid
freezing
what does the slanted part of the graph show
kinetic energy increasing
what does the flat part of the graph show
potential energy increasing and a chnage in state
explain evaporation
When a liquid is heated using heat energy it is converted into kinetic energy.
The liquid reaches a boiling point of 100 degrees celsius.
The particles gain so much energy they break the surface and leave as a gas.
Due to the gain in kinetic energy, the particles of the gas move extremely vigorously.
Why does temperature stays the same during changes in state as seen in the graph?
The temperature of any substance remains constant during the change of state because the heat energy supplied is used up in changing the state of matter and is used up from breaking several bonds or attractive forces. This heat which does not raise the temperature of the body is called latent heat.
