20 names of physical changes
Answers
Answer:
Explanation:
Ice melting involves a change from a solid to a liquid and the substances maintain the properties of water because the molecules never change.
Water boiling is a physical change as water molecules vibrate faster, they enter the gas phase and become water vapor.
Rubbing alcohol left uncovered will evaporate quickly into the air. ...
Boiling Liquids. Boiling uses heat to change a liquid to a gas. This occurs …
Clouding and Condensation. Clouding occurs when a substance …
Dissolution or Dissolving. Dissolution, or dissolving, is the process of a solid …
Freezing or Solidification. Freezing, or solidification,
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1. water freezing 2. ice melting 3. water boiling 4. solvent evaporating from a solution, leaving solute behind 5. adding sugar and lemon juice to water to make lemonade 6. adding sweetener to coffee or tea 7. sediment settling from a solution mark as barinliest
Answer:
how to Identify a Physical Change
One way to identify a physical change is that such a change may be reversible, especially a phase change. For example, if you freeze water into an ice cube, you can melt it into the water again.
Is the change reversible? Not all physical changes are easy to reverse.
Was there a color change (with exceptions), bubble formation, or formation of a precipitate? These are all signs of a chemical change, not a physical change.
Is the chemical identity of the end product the same as it was before the change? If the answer is yes, it's a physical change. If the answer is no, it's a chemical change.
Examples of Physical Changes
Remember, the appearance of matter changes in a physical change, but its chemical identity remains the same.
Crushing a can
Melting an ice cube
Boiling water
Mixing sand and water
Breaking a glass
Dissolving sugar and water
Shredding paper
Chopping wood
Mixing red and green marbles
Sublimation of dry ice
Crumpling a paper bag
Melting solid sulfur into liquid sulfur. This is an interesting example since the state change does cause a color change, even though the chemical composition is the same before and after the change. Several nonmetals, such as oxygen and radon, change color as they change phase.
Chopping an apple
Mixing salt and sand
Filling a candy bowl with different candies
Vaporizing liquid nitrogen
Mixing flour, salt, and sugar
Mixing water and oil
Explanation:
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