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How can a thermometer be used to help you decide whether your observation is physical or chemical change?
Wiki User
∙ 14y ago
Physical changes are usually very easily reversed.
Chemical changes usually show signs of:
-Heat being released
-Light being released
-Precipitate is formed
-Color change
Wiki User
∙ 12y ago
Wiki User
∙ 14y agousually when a chemical change happens the temperature rises
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How would you compare physical and chemical properties and physical and chemical changes?
physicals change is like it changes shapes and other things while chemical change can depend on the color change whether it bubbles or smokes etc.
What is the most important quiestion to ask to determine whether a change is physical or chemical?
Did the composition change
Is it physical or chemical when water freezes at 0 degree celsius?
When liquid water freezes to form ice, the chemical composition of water does not change. It will be H2O whether it is in liquid state or solid state. So it is a physical change and not a chemical change.
Is dry ice subliming a physical change or a chemical change?
A physical change. It's chemically still CO2, whether solid or a gas.
Is slicing bread a physical change or chemical change?
This is a physical change: the bread is not being chemically altered, and would have the same nutritional value whether eaten from the loaf or the slices. It would, however, be difficult to exactly reverse this physical change because of the nature of the product.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
What are the two criteria for whether a change is chemical or physical?
Oxygen and hydrogen
What would be a rule deciding whether a change is chemical or physical?
- A physical change is a change of phase or dimensions. - A chemical change is a change of the chemical structure, new molecules are formed, the initial molecule is transformed.
Is food physical property and chemical property?
Food is not a property. Food is a general description of matter that is edible can be eaten) the various chemical substances that make up food have both physical and chemical properties. Whether something is edible or not depends on both physical and chemical factors.
How do you decide whether an observed property of matter is a physical property?
If the property can be observed without changing the chemical composition of the substance, then it is a physical property. If the property can be observed only through a chemical reaction, then it is a chemical property.
Is reacting with vinegar a physical or chemical property?
chemical i think vinegar with bicarb produces co2
Is rain evaporation physical or chemical?
Physical change from liquid to vapour. The water remains chemically the same whether liquid or vapour.
Is gas physical or chemical at room temp?
This question makes no sense. All substances, whether solid, liquid, or gas have both physical and chemical properties at virtually all temperatures.
How would you compare physical and chemical properties and physical and chemical changes?
physicals change is like it changes shapes and other things while chemical change can depend on the color change whether it bubbles or smokes etc.
What is the most important quiestion to ask to determine whether a change is physical or chemical?
Did the composition change
Sulfur has a bright yellow color is this physical or cheimical property?
Its colour, its melting point, its boiling point, whether it is magnetic or not, whether it is an electrical conductor or not and its atomic mass are all physical properties.
Is it physical or chemical when water freezes at 0 degree celsius?
When liquid water freezes to form ice, the chemical composition of water does not change. It will be H2O whether it is in liquid state or solid state. So it is a physical change and not a chemical change.
