Concept explainers
For Practice 1.1
Is each change physical or chemical? Which kind of property (chemical or physical) is demonstrated in each case?
a. A copper wire is hammered flat
b. A nickel dissolves in acid to form a blue-green solution.
c. Dry ice sublimes (changes into a gas) without melting.
d. A match ignites when struck on a flint.
(a)
Interpretation: The categorization of the given change as chemical or physical change and the property that defines the given change is to be identified
Concept introduction: Any change that does not affect the chemical composition of a substance is known as a physical change. It is a reversible change.
Any change that occurs by affecting the chemical composition of a substance, resulting in the formation of new substance by the rearrangement of the atoms is called chemical change. It is an irreversible change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
Answer to Problem 1.1P
Solution:
The hammering of copper wire is a physical change and it corresponds to a physical property.
Explanation of Solution
Any change that does not affect the chemical composition of a substance is called physical change.
Any change that occurs by affecting the chemical composition of a substance resulting in the formation of new substance by the rearrangement of the atoms is called chemical change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
When copper wire is hammered flat, only the shape of the wire is changed. Since, there is no change in the chemical composition of the wire, it is a physical change.
Ability of a substance to flatten into a thin sheet by hammering is called malleability.
Malleability is a physical property.
(b)
Interpretation: The categorization of the given change as chemical or physical change and the property that defines the given change is to be identified
Concept introduction: Any change that does not affect the chemical composition of a substance is known as a physical change. It is a reversible change.
Any change that occurs by affecting the chemical composition of a substance, resulting in the formation of new substance by the rearrangement of the atoms is called chemical change. It is an irreversible change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
Answer to Problem 1.1P
Solution:
Nickel dissolving in an acid to form a blue-green solution it is a chemical change and it corresponds to a chemical property.
Explanation of Solution
Any change that does not affect the chemical composition of a substance is called physical change.
Any change that occurs by affecting the chemical composition of a substance resulting in the formation of new substance by the rearrangement of the atoms is called chemical change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
When nickel dissolves in an acid, it forms a new substance that is blue green solution.
Formation of a new substance is a chemical change as it involves the rearrangement of the reactant to form a new substance with new chemical property.
Therefore, the given change is a chemical change.
The given change shows chemical property.
(c)
Interpretation: The categorization of the given change as chemical or physical change and the property that defines the given change is to be identified
Concept introduction: Any change that does not affect the chemical composition of a substance is known as a physical change. It is a reversible change.
Any change that occurs by affecting the chemical composition of a substance, resulting in the formation of new substance by the rearrangement of the atoms is called chemical change. It is an irreversible change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
Answer to Problem 1.1P
Solution:
The sublimation of dry ice is a physical change and it corresponds to a physical property.
Explanation of Solution
Any change that does not affect the chemical composition of a substance is called physical change.
Any change that occurs by affecting the chemical composition of a substance resulting in the formation of new substance by the rearrangement of the atoms is called chemical change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
When a substance sublimes it changes its state. The chemical composition of the substance remains the same.
Therefore, sublimation of dry ice is a physical change.
The given change corresponds to a physical property.
(d)
Interpretation: The categorization of the given change as chemical or physical change and the property that defines the given change is to be identified
Concept introduction: Any change that does not affect the chemical composition of a substance is known as a physical change. It is a reversible change.
Any change that occurs by affecting the chemical composition of a substance, resulting in the formation of new substance by the rearrangement of the atoms is called chemical change. It is an irreversible change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
Answer to Problem 1.1P
Solution:
The ignition of a matchstick when struck on a flint is a chemical change and corresponds to a chemical property.
Explanation of Solution
Any change that does not affect the chemical composition of a substance is called physical change.
Any change that occurs by affecting the chemical composition of a substance resulting in the formation of new substance by the rearrangement of the atoms is called chemical change.
The property that is related to the physical state of a substance is termed as a physical property. These properties are used to describe matter.
The property related to the change in the chemical composition of a substance is termed as a chemical property.
Burning is a chemical change.
The head of a match consists of phosphorus and the flint comprises of potassium chlorate.
When they come in contact, the following reaction takes place,
Therefore, it is a chemical change.
Ignition is a chemical property, therefore the given change corresponds to a chemical property.
Want to see more full solutions like this?
Chapter 1 Solutions
Principles of Chemistry: A Molecular Approach (3rd Edition)
Additional Science Textbook Solutions
Essential Organic Chemistry (3rd Edition)
Introductory Chemistry (5th Edition) (Standalone Book)
General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
Chemistry & Chemical Reactivity
CHEMISTRY-TEXT
Chemistry: Structure and Properties (2nd Edition)
- 1.13 Physical properties may change because of a chemical change. For example, the color of an egg white changes from clear to white because of a chemical change when it is cooked. What is another common situation in which a chemical change also leads to a physical change?arrow_forwardA gasoline station in Manila, Philippines, charges 38.46 pesos per liter of unleaded gasoline at a time when one US. dollar (USD) buys 47.15 pesos (PHP). The car you are driving has a gas tank with a capacity of 14 U.S. gallons and gets 24 miles per gallon. (a) What is the cost of unleaded gasoline in Manila in USD per gallon? (b) How much would a tankful of unleaded gasoline for your car cost in USD? (c) Suppose that you have only PHP 1255 (a day's wage for an elementary school teacher) and the car's tank is almost empty. How many miles can you expect to drive if you spend all your money on gasoline?arrow_forward1.71 Is touch screen technology better described as a single design or as a more complex system? Explain your answer.arrow_forward
- Classify the following changes as chemical C or physical P a Baking bread b Grinding sugar into powder c What type of change is represented in c.? d What type of change is represented in d.?arrow_forwardHow does a heterogeneous mixture differ from a homogeneous mixture? How are they similar?arrow_forwardWater is put on the stove and heated with a natural gas burner. After some time, the water begins to bubble, and steam is given off. What kind of change has occurred? a. physical b. chemical c. no change has occurredarrow_forward
- The boiling of water is a physical change because the water disappears. physical change because the gaseous water is chemically the same as the liquid. chemical change because heat is needed for the process to occur. chemical change because hydrogen and oxygen gases are formed from water. chemical and physical change. Explain your answer.arrow_forwardThe following are properties of substances. Decide whether each is a physical property or a chemical property. a Chlorine gas liquefies at 35C under normal pressure. b Hydrogen burns in chlorine gas. c Bromine melts at 7.2C. d Lithium is a soft, silvery-colored metal. e Iron rusts in an atmosphere of moist air.arrow_forwardThe United States has high-speed trains running between Boston and New York capable of speeds up to 160 mi/h. Are these trains faster or slower than the fastest trains in the United Kingdom, which reach speeds of 225 km/h?arrow_forward
- 1.74 What are the two properties of ITO that make it serve its function in touch screen applications?arrow_forwardHow does the International System (SI) obtain units of different size from a given unit? How does the International System obtain units for all possible physical quantities from only seven base units?arrow_forwardThe volume of a sample of oxygen gas changed from 10 mL to 11 mL as the temperature changed. Is this a chemical or physical change?arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningIntroductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning