the temperature at which a substance begin to change phases from liquid to gas.
100
What is Mass?
The amount of matter in something.
100
Why do you think temperature is the measure of the "average" energy of motion of all the particles within a substance?
Temperature is the measure of a average energy of motion because particles move at different speeds.
100
What is a solvent?
The substance that dissolves a solute to form a solution.
100
Estella investigated the properties of 85 cubic centimeters (cm3) and a mass of 212.5 grams (g). What is the density of the substance.
The density is 2.5 cm/g cubed.
200
What is condensation?
The phase change in which a gas changes into a liquid; condensation releases heat energy to the surroundings.
200
What is melting point?
The temperature where a solid changes phases to become a liquid.
200
Suppose you inflate a balloon at room temperature, put the balloon into a freezer, and come back an hour later. What will the balloon look like?
The balloon will be deflated.
200
What is sublimation?
The phase change in which a solid becomes a gas, bypassing the liquid phase.
200
Dr. Boltzmann wants to find the average energy of motion of the particles within a block of steel. What property of the steel is Dr. Boltzmann trying to find?
Temperature.
300
What is Density?
The amount of mass in a given volume.
300
What is a physical change?
change in physical properties of a substance, such as mass, volume, shape, or density, without changing the substance itself.
300
Write the term for each phase change. A pot of water boils away on a heated stove, water vapor forms frost on a window, water vapor in a cloud turns to rain, Ice in Antarctica goes into the atmosphere.
The first is vaporization. The second is deposition. Third is condensation. Last is sublimation.
300
What is the definition temperature?
The measurement of the average energy of motion (heat energy) of the particles of the matter in a substance.
300
Lead has a density of 11.3 g/cm cubed. What volume of lead has a mass 226 g?
The answer is 20 cm cubed.
400
What is deposition?
the phase change in which a gas becomes a solid, bypassing the liquid phase; the placement of sediment or produce land forms.
400
What is a solubility?
The amount of substance that will dissolve in a given amount of another substance.
400
At sea level, water boils at 100 degrees Celsius. On top of Mt Everest, water boils at 71 degrees Celsius. Explain the difference.
There is less air pressure as yo go higher up in altitude and it gets colder.
400
What is the definition of vapor pressure?
The pressure exerted by vapor.
400
What phase of matter has a definite volume but no definite shape?
liquid
500
What is Heat energy?
The form of energy arising from the motion of all the particles in a system; heat energy moves between things that are at different temperatures; also called thermal energy.
500
What is a solution?
A mixture in which a solute is dissolved by a solvent; e.g., salt water and sugar water are solutions
500
If 10 kg of iron melts at 1,538 degrees Celsius, at what temperature will 5 kg of iron melt?
It will boil at the same temperature it might take a lot longer but it will boil at the same temperature.
500
What is vaporization?
The phase change in which a liquid changes to a gas.
500
What process lets you see your breath when the air is cold?