Solids, Liquids

When does something stop being a solid and becomes a liquid, and vice versa?

For instance, silly puddy is kind of a solid. But it's all move-ey. Syrup is kind of a liquid but it's all sloooow.

Something stops being a solid when it melts into a liquid.  Something stops being a liquid when it either freezes into a solid or it evaporates into a gas.

Silly puddy has it's own fixed shape, which is a trait of a solid.  Yes, this shape can be changed, but only through applied force, it does not naturally change out of this shape.  Silly puddy may not be as strong as iron, but with enough force even iron could change its shape, but remain a solid.

Syrup on the other hand does not have a fixed shape.  If you pour it into a container, it will take on the shape of the container, which is a trait of a liquid.  Syrup's slowness has to do with its viscosity.  Much like the difference between silly puddy and iron, syrup has this sort of difference between it and water.  Water has a much lower viscosity so moves faster, but both are liquids.

But silly puddy will change it's shape to a container if you give it enough time.

What if you have a liquid that has a really high viscosity?

>>3
Well you have to keep in mind the force of gravity is constantly affecting the silly puddy.  And even still, the silly puddy will not likely fill the container in the same way that a liquid would.

A liquid with a really high viscosity would simply be an extremely thick liquid, but would still not retain its own shape.

It's spelled PUTTY YOU FUCKING MORONS

Solid
Definte Shape
Definite Mass
Liquid
Varible Shape
Definite Mass
Gas
Varible Shape
Varible Mass

G-G-Glass transition

The state of matter actually depends on its thermodynamic temperature divided by specific latent heat capacity.

Snake... Snake...

SNAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAKE!

>>6
Since when does mass vary in gas state? 1 litre of hydrogen at standard conditions always has the same mass even if you change pressure, temperature or shape.

well >>10
th e thing is that >>6 is using mass as the same as density, witch is not

>>10
How do I changed pressure and temperature at standard conditions?

same volume } more density = more mass
same mass } more volume = less density
same density } more volume = more mass

Plasma Snake?

>>14
NO, THERMODYNAMICS

The ideal gas equation is not perfect, but it outlines the general trends of liquids and gases and their Density, Mass, Pressure, Temperature and Volume. n is the number of molecules and R is the "gas constant". Since we are not estimating rates of reactions etc.. to visualise the trends between D,M,P,T and V, n can be assumed to represent mass and R can be discarded.

PV = nRT
PV = MT

Density of course depends on volume and mass...

D = M/V, VD = M

... and can be used in the equation as needed.

If for instance you wanted to know what would happen if you kept the pressure the same, but increased the amount of mass in the system you can use an estimation like this to visualise what would change.

P = 1
PV=V=MT, VD=M

Same pressure and more mass = less temperature, if the volume stays the same density will increase and temperature will have to decrease further, if the density stays the same volume will increase and temperature will decrease less, possible to the point where temperature can increase.

Most likely we are looking at some gas escaping into standard conditions air, so density will stay the same in relation to pressure, however if we were trying to find out what would happen if we pumped a gas into a fixed volume and wanted to keep the pressure the same or below a limit for safety reasons we would find out that we need to use cool gas or decrease the temperature as the pressure increases.