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Phase changes are one example of a non chemical change. If the substance reacts the same way chemically, it has the same properties such as melting point, there has not been a chemical change.
Wiki User
∙ 11y ago
Changes in color, temperature, odor, or state of matter are not definitive clues that a chemical reaction has occurred. These changes could be caused by physical processes like melting, dissolving, or vaporization. To confirm a chemical reaction, one must look for evidence of new substances being formed with distinct chemical properties.
Wiki User
∙ 13y agoIndications of a chemical change include a change in color or smell, a release of heat, bubbling and/or precipitation. Any change other than these is unlikely to indicate a chemical change. Of the ones listed, precipitation is the one least observed.
Wiki User
∙ 10y agoGeneral signs that a chemical reaction has taken place are: a color change, a change in temperature, creation of gas bubbles, and formation of a precipitate. Something not on this list, like the change of state or shape is not a sign a chemical change has taken place.
Wiki User
∙ 8y agoSteam and constant temperature
Wiki User
∙ 12y agoThe change in shape.
Wiki User
∙ 8y agoit boils at 90 degrees Celsius
Wiki User
∙ 10y agochange in shape .
Wiki User
∙ 9y agoA precipitate forms.
C'Kala Evans
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Steam
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constant temperature
(APEX)
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What Are Clues That A Chemical Reaction That A Chemical Reaction May Have Taken Place?
formation of a solid and release of heat. apex
How can you tell if a chemical reaction has taken place when a hot air balloon flies?
When a hot air balloon flies, the chemical reaction that occurs is the heating of the air inside the balloon, causing it to expand and become less dense than the surrounding air. This creates lift, allowing the balloon to rise. You can confirm that a chemical reaction has taken place by observing the change in volume and buoyancy of the air inside the balloon as it heats up.
Is bananas turning black if you leave them in a warm cupboard for a week a chemical reaction and why?
Yes, it is a chemical reaction, because the colour of the banana has changed, which shows that a chemical reaction has taken place. Also, if the banana has gone black and turned bad, you can't change it back to it's original form, which proves that it is a chemical reaction and not a physical reaction. Remember - A chemical reaction has definitely taken place if : It's colour has changed A gas is given off There are energy changes Or, it can't be changed back to what it used to be! :) Hope this helps!!
What indicators definitely show that a chemical reaction has taken place?
use red cabbage , lemon juice, and milk. this will tell you whatever you put into if what you mix is and acid or alkali
Is a tossed salad is an example of a compound?
no,because no chemical reaction has taken place while the salad was being made
What Are Clues That A Chemical Reaction That A Chemical Reaction May Have Taken Place?
formation of a solid and release of heat. apex
What changes gives NO evidence that a chemical reaction has taken place?
Physical changes give no evidence that a chemical reaction has taken place, because no chemical reaction has taken place.
What evidence is there to show that a chemical reaction has taken place when an egg is cooked?
The change in color indicates that a chemical reaction has taken place.
What are clues that a chemical reaction has taken place A Formation of a gas B Constant temperature C Steam D Change in color?
Hugh G. Rection
How can you tell if a chemical reaction has taken place when a hot air balloon flies?
When a hot air balloon flies, the chemical reaction that occurs is the heating of the air inside the balloon, causing it to expand and become less dense than the surrounding air. This creates lift, allowing the balloon to rise. You can confirm that a chemical reaction has taken place by observing the change in volume and buoyancy of the air inside the balloon as it heats up.
When baking soda is mixed with vinegar which type of reaction has taken place?
its a chemical reaction
What are four clues that a chemical change has taken place?
A color changeproduction of lightproduction of gasproduction of bubbles
Is corrosion of aluminium metal a physical change or a chemical change?
It is a chemical change. Through corrosion, a chemical reaction has taken place.
What evidence that a chemical reaction has taken place would a living thing show?
work
What chemical reactions come with a fire what changes has taken place?
A fire is an oxidation reaction.
Which is indicated if a gas forms when two or more substances are mixed?
a chemical reaction has taken place.
Does a battery weigh less after completely discharging?
Yes, a battery will weigh less after completely discharging because the stored energy has been converted to other forms such as electrical energy and heat, resulting in a loss of mass in the battery.
