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Physical changes are usually reversible and chemical changes you can't usually reverse them.
Frying an egg is chemical because you can't get the raw egg back.
Freezing water would be physical...
hope this helps!
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Chemical change is a change that imply modifications in the structures of molecules; new compounds appear.
Ex.: burning of coal with releasing of carbon dioxide and water.
Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged.
Ex.: grinding of coal to be used in a thermal power unit.
What else can I help you with?
Compare the total amount of energy before and after physical and chemical changes?
In physical changes, the total amount of energy before and after remains the same as no new substances are formed. In chemical changes, there may be a difference in the total amount of energy before and after the reaction due to the formation of new substances and the breaking or forming of chemical bonds.
Can chemical reactions have physical changes?
No, chemical reactions involve changes in the chemical composition of substances, while physical changes involve changes in the physical state or appearance of a substance without altering its chemical composition.
Is mashing a potatoes to make mashed potatoes a chemical or physical reaction?
Mashing potatoes is a physical change because it does not change the chemical or physical properties of the potatoes.
How do physical and chemical changes affect mass?
law of consevation of mass states that the total mass before a chemical reaction is the same as the total mass after the chemical reaction
How are all physical changes alike?
All physical changes involve a change in the form, shape, or state of matter without altering the chemical composition of the substance. This means that the particles in the substance remain the same before and after the change, only their arrangement or state is altered.
Compare the total amount of energy before and after physical and chemical changes?
In physical changes, the total amount of energy before and after remains the same as no new substances are formed. In chemical changes, there may be a difference in the total amount of energy before and after the reaction due to the formation of new substances and the breaking or forming of chemical bonds.
Can chemical reactions have physical changes?
No, chemical reactions involve changes in the chemical composition of substances, while physical changes involve changes in the physical state or appearance of a substance without altering its chemical composition.
Is mashing a potatoes to make mashed potatoes a chemical or physical reaction?
Mashing potatoes is a physical change because it does not change the chemical or physical properties of the potatoes.
How do physical and chemical changes affect mass?
law of consevation of mass states that the total mass before a chemical reaction is the same as the total mass after the chemical reaction
How are all physical changes alike?
All physical changes involve a change in the form, shape, or state of matter without altering the chemical composition of the substance. This means that the particles in the substance remain the same before and after the change, only their arrangement or state is altered.
Is it true that Physical changes are often accompanied by changes in color or odor?
No, a chemical change is usually accompanied by a change in color or odor. A physical change is a change that is the same substance before and after and usually accompanied by a change in state of matter (evaporation, condensation, melting, freezing, sublimating, etc).
Cooking a chemical or physical change?
Both of those processes are parts of cooking. It depends on what you're doing. If you're melting or freezing its a physical change. If you're changing it into another substance then its chemical. A chemical change is when a substance is changed into another entirely different substance. This happens when an event occurs that changes the composition of the substance. Examples of chemical changes are color changes, absorbing energy, releasing energy, odor changes, producing gases, producing solids, and can't be easily reversed. A physical change is when there is a change is physical properties. This happens when an event occurs that doesn't change their chemical. Examples of physical changes are changes in the texture, shape, size, color, odor, volume, mass, weight, and density.
Is ice cubes shrinking a physical or chemical change?
The melting of ice cubes is a physical change, not a chemical change. The change involves a phase transition from solid ice to liquid water without any changes in the chemical composition of the substance.
When matter changes how it looks but not what it is made of?
It is a physical change.
What happens when a physical reaction occurs?
During a physical reaction, the arrangement of atoms and molecules changes, but no new substances are formed. This means that the chemical composition remains the same before and after the reaction. Examples of physical reactions include changes in state (solid to liquid, liquid to gas) or changes in shape.
Is a bomb exploding a physical change?
An atomic bomb uses fission-- the splitting of atoms. It is purely a physical change, at first. Any gases produced in the air surrounding the explosion (which occurs before it touches the ground), along with the intense heat produced, causes chemical changes in the air.
Is bending a paper clip a chemical change?
No, bending a paper clip is a physical change because the material of the paper clip remains the same before and after bending. Chemical changes involve a change in the chemical composition of a substance.
