What kind of changes are changes of state?

Answer 1

a solid → a liquid = melting (heat energy added) e.g. ice melts to water a liquid → a gas = vaporization (heat energy added) e.g. water to water vapour a solid → a gas = sublimation (heat energy added) e.g. dry ice (frozen CO2) to carbon dioxide a gas → a liquid = condensation (heat energy removed) e.g. cloud to rain a liquid → a solid = freezing (heat energy removed) e.g. water freezes to ice a gas → a solid = deposition (heat energy removed) e.g. water vapour to frost * solid-molecules tightly packed definite shape and volume(crystaline structure) * liquid-flow takes shape of container * gas-expands to fill container * plasma-electrons at 5000*C(neon lightning)

Answer 2

Physical changes are about energy and states of matter. Chemical changes happen on a molecular level.

Melting a sugar cube is a physical change because the substance is still sugar. Burning a sugar cube is a chemical change. The energy of the fire has broken down the chemical bonds.

Answer 3

the state of matter can change at different temperatura, for example when you put in the palm of your hand an ice cube until it makes wáter that is changing solid to liquid, another example is when the wáter of the ice cube you let it dry in the air that is changing liquid to gas.

Answer 4

There are actually at least 6 changes in states of matter: vaporization, condensation, melting, freezing, sublimation, and deposition.

Vaporization is when a liquid turns to a gas. There are 2 main types: evaporation and boiling. Boiling occurs when vaporization happens at a temperature above the boiling point of the substance; evaporization occurs at a temperature below the boiling point.

Condensation is when a gas turns to a liquid.

Melting is when a solid turns to a liquid.

Freezing is when a liquid turns to a solid.

Sublimation is when a solid turns directly into a gas without first changing into a liquid.

Deposition is when a gas turns directly into a solid without first changing into a liquid.

Answer 5

Do you mean state of matter or change or matter? :)

There are 3 'matters' gas, liquid and solid, everything is made up of these matters. Water is a liquid, cool it down (freeze it) and it is ice, a solid. Heat it back up and it's a liquid again if you heat the liquid up (boil it) steam or water vapour is given off, water vapour is the gas form of water.

Answer 6

Change in state are changes like from liquid to solid, from gas to liquid, or in rare cases from solid to gas.

Answer 7

nothing