1.2 Of Chem Chapter Flashcards
(21 cards)
What is a chemical change?
A change in matter that occurs when substances combine to form new substances.
Fill in the blank: A chemical change occurs when substances combine to form _______.
[new substances]
What do chemical changes involve?
Substances reacting to form new substances
Chemical changes result in the formation of new materials with different properties.
What occurs during physical changes?
There may be a change in appearance but no new substances form
Physical changes can include changes in state, such as melting or freezing.
What is an example of a change of state?
The change from solid to liquid
This can be observed when ice melts into water.
What is the state of matter that has a definite shape and volume?
Solid
An example of a solid is sugar.
What is the state of matter that has a definite volume but shape determined by surroundings?
Liquid
An example of a liquid is milk.
What is the state of matter that has its shape and volume determined by surroundings?
Gas
An example of a gas is air blown into a balloon.
Fill in the blank: A _______ is the state of matter that has a definite shape and volume.
Solid
Fill in the blank: A _______ is the state of matter that has a definite volume, but its shape is determined by its surroundings.
Liquid
Fill in the blank: A _______ is the state of matter that has its shape and volume determined by its surroundings.
Gas
What is the arrangement of particles in a solid?
Particles are packed together tightly, which gives solids a definite shape.
The particles in solids are constantly vibrating in place.
How do particles in a liquid behave compared to those in a solid?
Particles in a liquid are in contact but not as close as in solids, allowing them to slip and slide past one another.
This movement means liquids do not hold a shape and take the shape of their container.
What characterizes the arrangement of particles in a gas?
Gas particles have large spaces between them, making gases mostly empty space.
Gases can move freely in all directions and always spread out to fill their container.
What is kinetic energy?
Kinetic energy is the energy of motion.
All particles in solids, liquids, and gases are always moving, which means they have kinetic energy.
What does the Kinetic Molecular Theory explain?
It explains what happens to matter when the kinetic energy of particles changes.
The theory is developed using the particle model.
Fill in the blank: The particles in a solid are _______.
packed together tightly.
True or False: Liquids hold a definite shape.
False.
Liquids take the shape of their container.
Fill in the blank: Gases are mostly _______.
empty space.
What happens to particles in a gas when kinetic energy increases?
They move more freely and spread out further.
How does the kinetic molecular theory relate to the states of matter?
It describes the behavior of particles in solids, liquids, and gases based on their kinetic energy.
