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In a "physical change" a new substance is not created. In a "chemical change" a new substance is created. This applies to changes in states of matter.
For example, ice, water, and steam are all the same substance, even though they exist in three different states. The elements of which they are comprised do not change.
Sometimes you may be able to precipitate elements out of a substance through a phase change. In a mixture of alcohol and water you can fairly quickly boil out the alcohol.
What else can I help you with?
What does it mean to say a physical change is reversible?
A physical change is reversible if the substance can return to its original state after the change has occurred. This means that the change does not alter the chemical composition of the substance, allowing it to be reversed through processes like melting, freezing, or evaporation.
Is producing something new a physical or a chemical change?
That depends on your definition of producing something new. If you cut lumber to build a table ... you have produced something new, but that is a physical change. Wood is still wood. But if you mean combining two or more substances, like hydrogen gas and oxygen gas, and, after burning, you form water, then that is a chemical change.
What property of a substance does the change in temperature indicate?
Change in temperature directly indicates a change in the mean amount of kinetic energy possessed by each particle. It also indirectly indicates a possible change in state, and a possible change in chemical properties too (chemical reactions often involve energy transfer in the form of temperature change).
Why is the boiling point of water a physical change?
It's not a chemical change because the only the temperature and phase changes. The properties may be altered somewhat, but it the same chemical compound. No atomic bonds are broken or formed, there are no new substances formed, and none of the signs that indicate a chemical change are present. Some of the water is changing from a liquid to a gaseous state, and can be returned to a liquid state, unchanged, by cooling it.
Does a physical change mean that something has matured or grown up?
A physical change doesn't involve the molecule composition of a substance.
What does matter can change state mean?
The same substance can exist either as a solid, liquid or a gas and can change state depending on the temperature or external pressure.
What does the word fiber mean?
Fiber can mean two things. Fiber is a thread formed from a vegetable tissue, mineral substance, or textile. Fiber can also mean a substance formed of such threads.
What does it mean to say a physical change is reversible?
A physical change is reversible if the substance can return to its original state after the change has occurred. This means that the change does not alter the chemical composition of the substance, allowing it to be reversed through processes like melting, freezing, or evaporation.
What does changing of state means?
what does the term change of state mean
What does liquifacation mean?
Liquifaction is the process of turning a substance from a solid state into a liquid state through the application of heat or pressure. This physical change occurs when the substance's particles gain enough energy to move freely and no longer remain in a fixed arrangement.
Meaning of change of state?
what does the term change of state mean
What does a substance mean?
A pure substance is a substance that cannot be separated by means of physical separation but only by chemical. It is a change in time.
What does product mean science?
a substance that results from a chemical change
Does a physical change mean you form a new substance?
no, that's would be a chemical change :) .
What do the symbols mean Delta Hr Hf Hc Hn Ha in chemistry btw i know theyre enthalpy changes?
delta Hr is the enthalphy change of a reaction delta Hf is the enthalpy of formation where one mole of a substance is formed ( generally in its naturally occurring physical state) delta Hc is the enthalpy of combustion where one mole of a substance in its standard state undergoes combustion delta Hn is the enthalpy of neutralization where one mole of H+ reacts with OH- to form one mole of H2O delta Ha is the enthalpy of atomization where a molecule splits to form its neutral atomic components
Is producing something new a physical or a chemical change?
That depends on your definition of producing something new. If you cut lumber to build a table ... you have produced something new, but that is a physical change. Wood is still wood. But if you mean combining two or more substances, like hydrogen gas and oxygen gas, and, after burning, you form water, then that is a chemical change.
Is plastic physical or chemical?
If you mean that something is demonstrating plasticity, that would be a physical change.If you mean that plastic (a substance) is being formed, that's a chemical change.However, "plastic" itself is not really a change of any kind, so the best answer is "No."
