O.k. In solids , the particles are really well bonded together, and therefore have a small space inbetween each other.
In Gases, spaces between the particles are much more, and there is almost no bonding between particles... In Liquids, however the spaces between particles are less than in solids, but more than in gases...
hope I helped!
2007-09-13 15:14:18
·
answer #4
·
answered by puji_perfect2 2
·
0⤊
0⤋
State of matter
In the physical sciences, a state of matter is one of the many ways that matter can interact with itself to form a macroscopic, homogenous phase. The most familiar examples of states of matter are solids, liquids, gases, and plasmas; the most common state of matter in the visible universe is plasma. Less familiar phases include: quark-gluon plasma; Bose-Einstein condensates and fermionic condensates; degenerate matter; strange matter; superfluids and supersolids; and possibly string-net liquids.
Major differences between the common states of matter
It is useful for physicists to classify the different states of matter because there are common physical attributes that each state of matter shares.
For example, whereas both liquids and gases have no long range order, they are distinguished from each other in that two gas phases must always be miscible in each other, whereas two liquid phases can be either immiscible (oil and water) or completely miscible (water and ethanol) or both, depending on temperature (methanol and hexane).
Neither liquids nor gases can sustain a stress without continually deforming, whereas solids can be resistant to deformation.
Unlike gases or liquids, solids can have anisotropic physical properties. That is, a physical property like strength or electrical conductivity can depend on the macroscopic direction in a solid, but not in a liquid or gas.
Plasmas consists of free charged particles, usually in equal numbers, such as ions and electrons. Unlikes gases, plasmas may self-generate magnetic fields and electric currents, and responds strongly and collectively to electromagnetic forces. Plasma may also "self-organize", or "pinch" into filaments (with negative pressure), and form particle beams (jets), charge separation regions (double layers), and emit a wide spectrum of radiation including radio waves, light, x-rays, gamma rays and synchrotron radiation.
In general, the type of chemical bonds which hold matter together differ between the states of matter. For a gas, the chemical bonds are not strong enough to hold atoms or molecules together, and thus a gas is a collection of independent, unbonded molecules which interact mainly by collision. In a liquid, Van der Waals' forces or ionic interactions between molecules are strong enough to keep molecules in contact, but not strong enough to fix a particular structure, and the molecules can continually move with respect to each other. In a solid, metallic, covalent or ionic bonds provide cohesion between molecules, and the positions of atoms are fixed relative to each other over long time ranges. This being said, however, there is a great variety in the types of intermolecular bonds in the different materials classes: ceramics, metals, semiconductors or polymers, and each material or compound may be different.
[edit] The difference between phases and states of matter
States of matter are sometimes confused with phases. This is likely due to the fact that in many example systems, the familiar phase transitions are also transformations of the state of matter. In the example of water, the phases of ice, liquid water, and water vapor are commonly recognized. The common phase transitions observed in a one component system containing only water are melting/solidification (liquid/solid), evaporation/condensation (gas/liquid) and sublimation/deposition (gas/solid)
Transitions between different states of matter of the same chemical component are necessarily a phase transformation, but not all phase transformations involve a change in the state of matter. For example, there are 14 different forms of ice, all of which are the solid state of matter. When one form of ice transforms into another, the crystal structure, density, and a number of physical properties change, but it remains a solid.
Similarly, methanol and hexane are completely miscible liquids above approximately 42°C, but when a solution of the two is cooled below this temperature, the mixture separates into two phases, one rich in methanol, the other in hexane, although both resulting phases are the same state of matter: liquid.
The importance in distinguishing phases from states is especially important in multi-component systems. In these systems, the phase rule governs the equilibrium number of thermodynamically allowed unique phases and the number of degrees of freedom.
CHANGING STATES OF MATTER
Important Points All matter can move from one state to another. It may require very low temperatures or very high pressures, but it can be done. Phase changes happen when certain points are reached. Sometimes a liquid wants to become a solid. Scientists use something called a freezing point to measure when that liquid turns into a solid. There are physical effects that can change the freezing point. Pressure is one of those effects. When the pressure surrounding a substance goes up, the freezing point also goes up. That means it's easier to freeze the substance at higher pressures. When it gets colder, most solids shrink in size. There are a few which expand but most shrink.
Solids and Liquids Now you're a solid. You're a cube of ice sitting on a counter. You dream of becoming liquid water. You need some energy. Atoms in a liquid have more energy than the atoms in a solid. The easiest energy around is probably heat. There is a magic temperature for every substance called the melting point. When a solid reaches the temperature of its melting point it can become a liquid. For water the temperature has to be a little over zero degrees Celsius. If you were salt, sugar, or wood your melting point would be higher than water.
The reverse is true if you are a gas. You need to lose some energy from your very excited gas atoms. The easy answer is to lower the surrounding temperature. When the temperature drops, energy will be sucked out of your gas atoms. When you reach the temperature of the condensation point, you become a liquid. If you were the steam of a boiling pot of water and you hit the wall, the wall would be so cool that you would quickly become a liquid.
Add energy to create plasmaFinally, you're a gas. You say, "Hmmmm. I'd like to become a plasma. They are too cool!" You're already halfway there being a gas. You still need to tear off a bunch of electrons from your atoms. Eventually you'll have bunches of positively and negatively charged particles in almost equal concentrations. When the ions are in equal amounts, the charge of the entire plasma is close to neutral. (A whole bunch of positive particles will cancel out the charge of an equal bunch of negatively charged particles.) A plasma can be made from a gas if a lot of energy is pushed inside. All of this extra energy makes the neutral atoms break apart into positively and negatively charged ions and free electrons. They wind up in a big gaseous ball.
2007-09-13 17:27:29
·
answer #9
·
answered by sagarukin 4
·
0⤊
0⤋