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It is not so hard.
Some indicators of a chemical reaction are:
- formation of new compounds - change of color
- change of odor
- release of a gas
- change of the temperature (absorption or release)
- change of the viscosity
- formation of a precipitate
- change of general appearance
- possible explosion - sometimes a sound is produced - possible chemiluminescence
What else can I help you with?
How do you know if there is a chemical change?
You can determine if a chemical change has occurred by observing a change in color, production of gas, formation of a precipitate, or a change in temperature. Chemical changes involve the formation of new substances with different chemical properties.
How do you determine a chemical change has occurred when two substances are combined?
A chemical change can be determined when two substances are combined by observing if there is a color change, formation of a precipitate, evolution of gas, or change in temperature. Additionally, if the chemical properties of the substances change, such as their reactivity or toxicity, it indicates a chemical reaction has taken place.
How can one determine the change in enthalpy (H) for a chemical reaction?
One can determine the change in enthalpy (H) for a chemical reaction by measuring the heat released or absorbed during the reaction using a calorimeter. The difference in heat between the products and reactants gives the enthalpy change.
When matter changes state what is a chemical property?
A chemical property is a characteristic of matter that describes its ability to undergo a chemical change or reaction. These properties determine how a substance will react with other substances and can only be observed during a chemical change, not a physical change like a change in state.
How would you determine if a chemical change has occurred?
You can determine if a chemical change has occurred by looking for signs such as a change in color, formation of a precipitate, evolution of gas, or release of heat or light. Additionally, if the chemical composition of the substance has been altered, it is likely that a chemical change has taken place.
What 4 factors determine a chemical change?
heating is one of them
Is a boiling egg a physical change?
No, hard-boiling an egg is a chemical change. By cooking the egg you change its chemical composition.
Is a given change a chemical or a physical change?
It depends. Physical can be easily reversed. Chemical is hard, if not impossible to reverse.
What is the most important question to ask determine whether a change is a physical or chemical change?
did the composition change
How do you know if there is a chemical change?
You can determine if a chemical change has occurred by observing a change in color, production of gas, formation of a precipitate, or a change in temperature. Chemical changes involve the formation of new substances with different chemical properties.
How do you determine a chemical change has occurred when two substances are combined?
A chemical change can be determined when two substances are combined by observing if there is a color change, formation of a precipitate, evolution of gas, or change in temperature. Additionally, if the chemical properties of the substances change, such as their reactivity or toxicity, it indicates a chemical reaction has taken place.
How can one determine the change in enthalpy (H) for a chemical reaction?
One can determine the change in enthalpy (H) for a chemical reaction by measuring the heat released or absorbed during the reaction using a calorimeter. The difference in heat between the products and reactants gives the enthalpy change.
How would you determine if a chemical change had occurred?
Some characteristics of a chemical change are: - change of smell - change of color - release of gases - change of temperature - formation of a precipitate - change of the aspect - change of pH in solutions - change of viscosity - flames or explosion etc.
When matter changes state what is a chemical property?
A chemical property is a characteristic of matter that describes its ability to undergo a chemical change or reaction. These properties determine how a substance will react with other substances and can only be observed during a chemical change, not a physical change like a change in state.
Are physical and chemical change different?
Physical change does not produce a new substance. Chemical change produces a new substanceIn a chemical change the atoms/molecules are chemically joined together so they are very hard to separate. were as they are easyer to separate in a physical change
What are 3 things to look for to determine if a chemical change was produced in the experiment?
change in temperature, formation of a gas, formation of a solid
What are the factors which determine a chemical change?
Factors that determine a chemical change include the types of substances involved, the presence of a catalyst, temperature, pressure, and concentration of reactants. Additionally, the activation energy required for the reaction to occur also plays a significant role in determining whether a chemical change will take place.
