Changes in Matter
Which of the following properties are intensive, and which are extensive? Length
extensive
Which of the following properties are intensive, and which are extensive? length
extensive
Milk and oil are
liquids.
Chemical or Physical Change: chemical properties change?
chemical
Chemical or Physical Change: new substances form?
chemical
Chemical or Physical Property: a new substance forms?
chemical
Chemical or Physical Property: multiple substances be present?
chemical
Determine whether each statement is a description of a physical property or a chemical property. Paper burns readily in air.
chemical
Determine whether each statement is a description of a physical property or a chemical property. Sodium metal reacts vigorously with water to produce hydrogen gas.
chemical
Determine whether each statement is an example of a physical change or a chemical change. An egg is fried.
chemical
Determine whether each statement is an example of a physical change or a chemical change. Newspaper yellows in the sun.
chemical
Determine whether each statement is an example of a physical change or a chemical change. Wood is burned.
chemical
The list below includes some of the properties of ammonia. Identify the physical properties in the list: gas at room temperature strong, unpleasant odor reacts with hydrochloric acid dissolves easily in water burns in oxygen
1, 2, 4
Which of the following could be classified as matter? desk water idea cloud helium dream
1, 2, 4, 5
The pictures to the right show some common baking ingredients: butter, flour, oil, egg, sugar, and milk. Suppose someone wanted to sort these ingredients into two groups, with at least two items in each group. Which of the properties below could be used to sort the ingredients? edible or inedible solid or liquid white or not white dissolves in water or does not dissolve in water
2, 3, 4
The list below includes some of the properties of butane, a common fuel. Identify the chemical properties in the list. denser than water burns readily in air boiling point of -1.1°C odorless does not react with water
2, 5
What is magnetism? What type of property is it?
Ability to be attracted by a magnet. Physical
What is malleability? What type of property is it?
Ability to be reshaped by the application of physical force. physical
What is conductivity? What type of property is it?
Ability to transmit heat or electricity. physical
What is transparency? What type of property is it?
Degree to which light can pass through a substance physical
An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two ways he could change the metal chemically to try to identify it.
Heat the metal until it melts (physical change). Attempt to react the metal with oxygen (chemical change). Stretch the metal into a wire (physical change). Attempt to react the metal with acid (chemical change).
examples of intensive properties
Melting, boiling point Density Conductivity Magnetism
What is a physical property?
a characteristic of a substance that can be observed without changing the identity of the substance
What is an extensive property?
a physical property that depends on the amount of sample present.
What is an intensive property?
a physical property that depends only on a substance's identity and not on the amount of sample present
What is matter?
anything that has mass and takes up space.
Examples of chemical changes.
burning, cooking, reacting
What is a chemical property?
characteristic of a substance that is observable only when the substance interacts with another substance
Examples of characteristic properties
color state at room temp melting/boiling point density luster malleability/ductility
Indicators of chemical changes
color change solid disappearance gas formation precipitate formation light & heat production
examples of chemical properties
flammability and reactivity
Which of the following properties are intensive, and which are extensive? Malleability
intensive
Which of the following properties are intensive, and which are extensive? hardness
intensive
examples of extensive properties
mass, volume, length
Examples of physical changes
melting bending cutting boiling
Examples of matter
metal, wood, glass, paper, and cloth
Determine whether each statement is a description of a physical property or a chemical property. Alcohol has a sweet odor.
physical
Determine whether each statement is a description of a physical property or a chemical property. Please check the box that applies. Copper conducts heat well.
physical
Determine whether each statement is a description of a physical property or a chemical property. Salt is a solid.
physical
Determine whether each statement is a description of a physical property or a chemical property. Steel is attracted to magnets.
physical
Determine whether each statement is an example of a physical change or a chemical change. Paper is shredded.
physical
Determine whether each statement is an example of a physical change or a chemical change. Wax melts on a hot stove.
physical
Dry ice (solid carbon dioxide) vaporizes to form carbon dioxide gas.
physical
Color, odor, and texture Melting point and boiling point State of matter Mass, weight, and density
physical properties
What is a physical change?
results in a change in some of the physical properties of matter but not its identity
What is a chemical change?
results in a change in the identity and properties of matter.
Matter can be ________, ____________, or ____________.
solid liquid gas
What is precipitate formation?
solid that forms from a liquid during a change process
Flour, eggs, sugar, and butter are all
solids.
What are characteristic properties?
the properties that are most useful in identifying a substance
