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No. There are two main types of changes: physical and chemical.
A physical change does not affect the chemical make up of the element/compound/etc. For example, when you heat water up enough it changes from its liquid state, H2O (l), to its gaseous state, H2O (g). However, as you may have noticed, although the state of matter changed (liquid to gas) the chemical formula, H2O, remained the same. Physical changes include change in state, temperature, or shape, among others.
A chemical change, or a chemical reaction, changes the chemical makeup of the affected substance. The reaction can occasionally change the state of the matter, but the difference is that the formula of the old substance changes, creating an entirely new substance. This example demonstrates a chemical reaction:
2 Na(s) + Cl2(g) → 2NaCl(s)
As you can see, the product is entirely different from the two reactants. Chemical changes can be recognized through the use of key identifiers: change in energy, odor, color, or temperature; the formations of precipitates or solids; and/or gas bubbles.
What else can I help you with?
Which of these could be considered a system under thermochemical study?
A chemical reaction taking place in a sealed container can be considered a system under thermochemical study, as it involves the study of energy changes associated with the reaction.
What is the model that names all the chemicals in a reaction called?
The model that names all the chemicals in a reaction is called the chemical equation. It represents the reactants, products, and their respective symbols and formulas in a balanced format to show the chemical changes that occur during the reaction.
Are indicators changing colour a chemical change?
Any chemical change within any product is due to the ph level that the product carries. Chemical changes occur when you mix one thing with another. Most things you mix together will cause a reaction but it all depends on if the product is an acid or not.
How do you know when a chemical reaction has ended?
A chemical reaction is considered to have ended when the reactants have been completely consumed and no more products are being formed. This is typically indicated by a lack of observable changes in the system, such as the absence of gas bubbles, color changes, or temperature changes. Other methods may involve monitoring reaction progress using analytical techniques like spectroscopy or chromatography.
Is the reaction between aluminum and copper chloride a physical or chemical change?
The reaction between aluminum and copper chloride is a chemical change. During the reaction, a chemical reaction occurs resulting in the formation of new substances with different properties than the original reactants. This is different from a physical change where substances maintain their original properties.
Another term for a chemical change is?
Ah, chemical changes are like little magic tricks happening all around us in nature. Another term for a chemical change is a chemical reaction. It's when substances transform into new materials with different properties, just like how a caterpillar transforms into a butterfly. Isn't that just delightful?
Why is burning of gas considered a chemical change?
All burning reactions involve chemical reactions (chemical changes).
Do you think a chemical reaction has taken place Can you explain your reasoning behind your conclusion?
Yes, a chemical reaction has likely taken place if there is a change in the chemical composition of the substances involved. This can be observed through the formation of new substances, changes in color, temperature, or the release of gas. These are all indicators that a chemical reaction has occurred.
Is rusting iron a physical change in science?
no rusting iron is not a physical change it is a chemical change
What are the four ways to tell if a reaction has ofurred?
A reaction has occurred if there are observable changes such as a color change, the formation of a precipitate, the evolution of gas (bubbles), or a temperature change (either an increase or decrease). These indicators suggest that new substances have formed as a result of the chemical reaction. It's important to consider the context, as not all changes necessarily indicate a chemical reaction.
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 the characteristics of a chemical system in equilibrium?
all the changes to a system cancel out APEX
