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How can knowing about physical and chemical changes affect an molecular gastronomy chef?
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Are physical changes chemical reactions?
No, physical changes normally refer to changes other than chemical reactions. If you have a loaf of bread and cut it in half, that is a physical change but not a chemical change. If you eat the bread and digest it, that is a chemical change.
What kind of change such as a change of state the substance of the whole changes but its underlying structure remains the same?
In changes in which the molecular structure of a substance remains constant, such as changes of state, we often refer to these changes as Physical Changes. If the molecular structure is altered it would be a Chemical Change.
What are some physical changes in snow?
Snow has no chemical changes. It goes through a freezing stage of water vapor, just a molecular change.
What is a key feature of a chemical change?
Any change that changes the atomic and molecular composition and structure of the substances involved. Mostly it is a physical change that cannot be reversed.
What are the differences between a chemical and physical change?
A physical change doesn't change the molecular properties of a substance. Some examples of physical changes include tearing paper, or the evaporation of water. A chemical change does change the molecular properties of a substance. For example, if you burn wood you get leftover carbon, and CO2 is also released; no longer does the wood have the same molecular properties or structure.
What are facts about physical and chemical change?
Chemical changes take place on the molecular level
Are physical changes chemical reactions?
No, physical changes normally refer to changes other than chemical reactions. If you have a loaf of bread and cut it in half, that is a physical change but not a chemical change. If you eat the bread and digest it, that is a chemical change.
A piece of solid gold that changes from a solid to a liquid is a physical or chemical change?
physical: it's a change of state, it does not change the chemical makeup: molecular, atomic
Does freezing alcohol change its molecular structure?
No because physical states of matter changes are physical changes. they are not chemical changing meaning it is still alcohol, just frozen.
Is slicing an apple is a chemical change or a physical change?
This is a physical change. You only change the shape and size of an apple by slicing it. Chemical changes would mean changing the molecular composition of the apple.
What kind of changes is it chemical or physical and why?
a physical change is a phase change, such as water to ice or water vapor. a chemical change takes place on a molecular level, producing a new substance.
What are the chemical and physical changes of photosynthesis?
There are no physical changes. there are only chemical changes.
Is water condensing a chemical change?
No, it is a Physical Change. Physical Changes are concerned with energy and states of matter. A physical change does not produce a new substance. Changes in state or phase (condensation, melting, freezing, vaporization, sublimation) are physical changes. Other examples of physical changes include crushing a can, melting ice, and breaking a bottle. Chemical changes take place on the molecular level. A Chemical Change produces a new substance. Some examples of chemical changes include combustion (burning) and rusting of a metal.
What kind of change such as a change of state the substance of the whole changes but its underlying structure remains the same?
In changes in which the molecular structure of a substance remains constant, such as changes of state, we often refer to these changes as Physical Changes. If the molecular structure is altered it would be a Chemical Change.
Are state changes chemical or physical changes?
Physical Changes
Are all physical changes accompanied by chemical changes?
Not all chemical changes are accompanied by a visible physical change. Most chemical changes however will be accompanied by a physical change.
What are some physical changes in snow?
Snow has no chemical changes. It goes through a freezing stage of water vapor, just a molecular change.
