a.
To determine:
If cream, sugar, and flavorings are mixed and frozen to make ice cream is a physical change or a
Concept introduction:
Physical change is defined as that change in which the chemical composition of the substance does not change. In physical change one form of a substance is changed to another form, no new product is formed.
Examples of physical change are condensation, melting and freezing.
A chemical change is defined as that change in which the chemical composition of the substance changes. In a chemical reaction, the formation of a new product takes place.
Examples of a chemical reaction are rusting of iron and formation of a precipitate.
b.
To determine:
If milk spoils and becomes sour is a physical change or a chemical reaction.
Concept introduction:
Physical change is defined as that change in which the chemical composition of the substance does not change. In physical change one form of a substance is changed to another form, no new product is formed.
Examples of physical change are condensation, melting and freezing.
A chemical change is defined as that change in which the chemical composition of the substance changes. In a chemical reaction, the formation of a new product takes place.
Examples of a chemical reaction are rusting of iron and formation of a precipitate.
c.
To determine:
If a puddle of spilled nail polish remover disappears is a physical change or a chemical reaction.
Concept introduction:
Physical change is defined as that change in which the chemical composition of the substance does not change. In physical change one form of a substance is changed to another form, no new product is formed.
Examples of physical change are condensation, melting and freezing.
A chemical change is defined as that change in which the chemical composition of the substance changes. In a chemical reaction, the formation of a new product takes place.
Examples of a chemical reaction are rusting of iron and formation of a precipitate.
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General, Organic, and Biological Chemistry (3rd Edition)
- Which of the following is a pure substance existing as different phases in a heterogeneous system? a. salt dissolved in water b. cork floating in water c. flour suspended in water d. ice floating in waterarrow_forward6. When Mr. Calvo heated up the water, the sugar dissolved Name: Date: Class: Pages: 149 to 157 5. To make a solution, particles from one substance so that you cannot see them. into another substance A. dissolves B. drags C. rubs D. condenses A. slower B. faster C. without any change D. into salt 7. A begins and ends with the same kind of matter. A. chemical change B. physical change D. solute C. solvent 8. A begins with one kind of matter and ends with another. B. chemical change B. physical change C. solvent D. solute . when a substance goes through a chemical change, it forms a new substance that has different physical and chemical properties. Chemical changes are often caused by changes in temperature. Which of the following is an example of a chemical change caused by a change in temperature? А. burning wood in a fire melting ice cream С. В. freezing a popsicle boiling water D. 10.Iron becomes rust when it reacts with oxygen. Which of the following is another example o material…arrow_forward14. A researcher finds that a solid has high melting and boiling points, and is soluble in water. Based on this information, he(she) can believe that the substance is a(n) A. ionic compound B. molecular compound C. homogeneous mixture D. heterogeneous mixture E. flammable substancearrow_forward
- 7. A student combines pure NaCl (sodium chloride) with pure DI water. The resulting is an example of: a. homogeneous mixture b. heterogeneous mixture c. pure substance d. suspensionarrow_forwardIndicate whether the following sample of matter is a heterogeneous mixture, a homogeneous mixture, a compound, or an element. 4. a colorless gas that cannot be separated into simpler substances using physical means and that reacts with the metal a. heterogeneous mixture b. element c. compound d. homogeneous mixturearrow_forwardLabel each of the following as either a physical change ora chemical reaction:a. A puddle of water evaporates.b. Food is digested.c. Wood is burned.arrow_forward
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- Which one of the processes listed below describes (rather than physical) change? a. Fat is metabolized by the body to make energy b. Water evaporates from the surface of the skin. c. Frozen lemonade is reconstituted by adding water to it. d. Kool-aid is made by adding a dry powder to water Explain the answerarrow_forwardA. Identify whether the following example is a physical change or a chemical change. 9. The tie-dye process makes colorful clothes. 10. Adding water to dilute alcohol concentration.arrow_forwardClassify each of the following as a physical or chemical change:a. A gold ingot is hammered to form gold leaf.b. Gasoline burns in air.c. Garlic is chopped into small pieces.arrow_forward
- World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning