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What is a psyhical reaction?
A physical reaction, or change, is one that can be observed without changing the chemical composition of the substance. Boiling is a physical change because the substance that is boiling does not change its chemical composition. For example, water is still H2O whether it is boiling or not boiling.
Which in the following events is not a common sign that a chemical change taken place?
For example melting, boiling, evaporation, transformation in powder are not signs of a chemical reaction.
What is and example of a chemical reaction melting water burning a piece of wood dissolving salt in water or breaking a tree branch?
An example of a chemical reaction is burning a piece of wood. During this process, wood reacts with oxygen in the air to produce carbon dioxide, water vapor, and ash, resulting in a chemical change. In contrast, melting water, dissolving salt in water, and breaking a tree branch are physical changes, not chemical reactions, as they do not alter the chemical composition of the substances involved.
Is sugar dissolving an example of chemical change?
It is a physical change.
Is boiling water an example of a chemical change?
No.
What is sugar dissolving and example of?
a chemical reaction
What is chemical change when dissolving?
1. Dissolving with reaction - an example is dissolving in an acid - involve a chemical change because new compounds are formed. 2. Dissolving without a reaction - for example dissolution of table salt in water - is not a chemical change; only dissociation can occur.
What is an example of a chemical reaction that absorbs heat?
dissolving ammonium chloride in water
What are some non examples of combustion?
Melting an ice cube is not an example of combustion, as it does not involve a chemical reaction with oxygen to produce heat and light. Dissolving sugar in water is another non-example, as it is a physical change and does not involve the chemical process of combustion. Boiling water is also not combustion, as it is a phase change from liquid to gas due to heat, not a reaction with oxygen.
Is salt dissolving a chemical reaction?
Yes. A salt is an ionic compound and so dissolving (or hydrolyzing) it is a chemical reaction. An example with sodium chloride (table salt): NaCl (solid) -> Na+ + Cl- The charges on the products indicate that they are aqueous (in solution). Since the reactant breaks apart into it's products, this is a dissociation reaction.
Is dissolving salt in water chemical or physical change?
Dissolving salt in water is an example of a physical change. Although the ions of sodium and chlorine separate when the salt dissolves, no chemical reaction takes place.
What is a psyhical reaction?
A physical reaction, or change, is one that can be observed without changing the chemical composition of the substance. Boiling is a physical change because the substance that is boiling does not change its chemical composition. For example, water is still H2O whether it is boiling or not boiling.
Which in the following events is not a common sign that a chemical change taken place?
For example melting, boiling, evaporation, transformation in powder are not signs of a chemical reaction.
What is and example of a chemical reaction melting water burning a piece of wood dissolving salt in water or breaking a tree branch?
An example of a chemical reaction is burning a piece of wood. During this process, wood reacts with oxygen in the air to produce carbon dioxide, water vapor, and ash, resulting in a chemical change. In contrast, melting water, dissolving salt in water, and breaking a tree branch are physical changes, not chemical reactions, as they do not alter the chemical composition of the substances involved.
Is salt dissolves in water a physical or a chemical?
Dissolving salt in water is an example of a physical change. Although the ions of sodium and chlorine separate when the salt dissolves, no chemical reaction takes place.
What is dissolving salt into water an example of?
No, this is not a redox reaction (or a chemical reaction at all) because no species gain/lose electrons in this process.
Is sugar dissolving an example of chemical change?
It is a physical change.
