What is the temperature at which a substance begins to change phases from liquid to gas
100
What is mass
What is the amount of matter in something
100
What is solute
What is the substance dissolved by a solvent to form a solution
100
Suppose you inflate a balloon at room temperature,put the balloon into a freezer, and come back and an hour later. What will the balloon look like?
The balloon will look deflated because when its cold the particle come together
100
Estella investigated the properties of a grayish, shiny metal with a volume of 85 cubic centimeters (cm3) and a gass of 212.5 grams (g). What is the density of the substance?
2.5 g/cm3
200
What is condensation
What is the phase change in which a gas changes to a liquid; condensation releases heat energy to the surroundings
200
What is melting point
What is the temperature at which a substance begins to change phases from solid to liquid
200
What is solution
What is a mixture in which a solute is dissolved by a solvent
200
A pot of water boils away on a heated stove.
Water vapor forms frost on a window.
Water vapor in a cloud turns into rain.
Ice in Antarctica goes directly into the atmosphere
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
What is the amount of mass in a given volume
300
What is phase
What is a state of matter
300
What is solvent
What is the substance that dissolves a solute to form a solution
300
Suggest why iron's melting point is so much higher than water's, and why nitrogen's is so much lower than both iron's and water's
Iron's melting point is higher than water because the attraction of iron atoms is stronger than water. Nitrogen's melting point is lower than iron and water because the attraction is weaker
300
Lead has a density of 11.3 g/cm3. What volume of lead has a mass of 226 g?
20 cm3
400
What is deposition
What is the phase change in which a gas becomes solid, bypassing the liquid phase
400
What is physical change
What is change in physical properties of a substance, such as mass, volume, shape, or density, without changing the substance itself
400
What is sublimation
What is the phase change in which a solid becomes a gas, bypassing the liquid phase
400
At sea level, water boils at 100 degrees celsius. On top of Mt. Everest, water boils at 71 degrees celsius, Explain the difference.
Air pressure decreases with altitude so vapor pressure at which water boils also decreases as altitude increases
400
What phase of matter has a definite volume but no definite shape?
Liquid
500
What is heat energy
What is 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 solubility
What is the amount of a substance that will dissolve in a given amount of another substance
500
What is temperature
What is the measurement of the average energy of motion of the particles of matter in a substance
500
If 10 kg of iron melts at 1,538 degrees celsius, at what temperature will 5 kg of iron melt?
1,538 degrees celsius the same but requires maximum energy
500
What process lets you see your breath when the air is cold?