Changes of Matter
Are "phase changes" and "dissolving" chemical or physical changes?
Physical
Define Absolute Zero
The point at which particles have no thermal energy and all particle movement has stopped.
Phase with a definite shape and volume
Phase without a indefinite shape and volume with electrical charges
Phase without a indefinite shape and volume
Phase with a definite volume but an indefinite shape
Solid
Plasma
Gas
Liquid
What happens to the temperature during a phase change?
Remains the same
Define chemical and physical properties
Physical- can be seen using the 5 senses
Chemical- must undergo some kind of chemical change, reaction, or describes the chemical make up and cannot be witnessed using the 5 senses
Which is an indication that a chemical change is taking place?
A. Iron changes color when heated.
B. Gas bubbles form in boiling water.
C. Solid wax forms when melted wax falls in ice water.
D. A gas forms when vinegar and baking soda are mixed.
D. A gas forms when vinegar and baking soda are mixed.
What are the plateaus for on the time vs temperature graph?
They show a steady temperature for a phase change.
In the Kinetic Theory of Matter:
_________ is made up of _________.
Everything is made up of particles.
Which statement best describes the motion of water molecules as the water changes state from steam to liquid?
A. The molecules move faster and occupy more space.
B. The molecules move slower and occupy more space.
C. The molecules move faster and occupy less space.
D. The molecules move slower and occupy less space.
D. The molecules move slower and occupy less space.
Which fact about water is an example of a chemical property?
A. Water freezes when it expands.
B. The boiling point of water is 100°C.
C. Water can separate into hydrogen and oxygen
D. The density of water is greater than the density of ice.
C. Water can separate into hydrogen and oxygen
Students performed an investigation on how aluminum cans taken to a recycle center were able to be reused. They found out an aluminum can undergoes which type of change and why?
a physical change because the material remains the same
What happens to the movement of particles as thermal energy increases?
The particles speed up (more energy)
In the Kinetic Theory of Matter:
There are tiny ________ between particles and the particles are ____________ to each other.
spaces
attracted
As you increase in energy, what are the phase changes on the diagram if you start as a solid?
melting and boiling
Which of the following are physical properties? (Can be more than one and it is all or nothing.)
solubility, luster, malleability, combustibility
solubility, luster, malleability
Josie investigated chemical and physical changes using eggs. She did the following four actions to four different eggs.
Which action describes a physical change?
Cracked
What happens to the kinetic energy as you increase in temperature and time?
Kinetic Energy increases
An ice cube melts on a hot summer day because the energy of the particles...
A. decreases over a period of time and is lost.
B. increases and the particles move apart.
C. causes them to lock together.
D. is converted into potential energy.
B. increases and the particles move apart.
What is the phase change when an object goes from a solid to a gas, skipping the liquid phase?
Sublimation
Which process describes the change from a gas to a liquid?
Condensation
Which one shows one example of a physical change and one chemical change?
A. freezing water and burning coal
B. rusting of iron and baking a cake
C. dissolving powder and shredding paper
A. freezing water and burning coal
During the Heat of Vaporization phase change, what state of matter(s) are there?
Liquid and Gas
Put the States of matter in order based on decreasing energy (highest energy to lowest)
Plasma, Gas, Liquid, Solid
Endothermic reactions (release, absorb) thermal energy
Exothermic reactions (release, absorbed) thermal energy
Endothermic reactions absorb thermal energy
Exothermic reactions release thermal energy
Which process describes the change from a gas to a solid?
Deposition