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Not necessarily. There's something called the enthalpy of mixing which can be responsible for lowering the temperature when two substances are mixed even if no chemical reaction occurs. It may also be an endothermic reaction; if there are other signs of a reaction (formation of a precipitate, evolution of a gas, color change, etc.) then it probably is a chemical reaction.
What else can I help you with?
An example of a chemical change is?
Lighting A Match
Is precipitate physical change?
Precipitation in weather terms (rain, snow, etc.) is a physical process. Precipitation in chemical terms (e.g. lead iodide falling out of solution) is a chemical change.
What are the 5 characteristics of chemical change?
During a chemical change the structure of molecules (as chemical composition) is changed. Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds
Is it correct to say that only one observable change accompanies a chemical reaction?
No.Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminescence -formation of new compounds
What does transmutation involve?
Transmutation of elements refers to the conversion of one chemical element into another. This occurs in nuclear reactions or through radioactive decay.
Does a solution have a chemical change?
A solution does not have a chemical change, but it does have a physical change in state.
Are compounds broken down into elements by chemical or physical change?
its a chemical change. a physical change does not change the chemical makeup of a substance. it simply changes its form or physical state. examples: ice melting, a tree being chopped down.
What change is the conversion of milk to curd?
This is a chemical change.
When elements combine to form compounds is this a physical or chemical change?
This is a chemical change.
Is dissolving Skittles in salt and water a chemical or physical change?
Dissolving Skittles in salt and water is a physical change. The Skittles are still the same chemical compounds, but they are now dispersed throughout the water-salt solution.
A change where compounds are formed or deconposed is a?
chemical change
Is ferment chemical or physical change?
Fermenting cheese will become a chemical change not a physical change.
How do chlorine compounds change the chemical properties of a pool?
chemical
What is a true statement about a chemical change?
They can be reversed by physical changes...
Is this a chemical change or physical change silver nitrate solution is added to another solution producing a white solid?
it is a chemical change
What kind of change during which compounds are formd?
Chemical change.
What kind of chemical compound do salt in water form?
When salt is mixed in with water, they form a solution. Salt is the solute, and water is the solvent.
