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definitions
definitions
definitions
NJ ask practice
NJ ask practice
100
what is the boiling point?
the temperature at which a substance begins to change phases from liquid to gas.
100
what is mass?
the amount of matter in something.
100
what is solute?
the substance dissolved by a solvent to from a solution.
100
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 look deflated because when it is cold the particles are closer together
100
Estella investigated the properties of a grayish, shiny metal with a volume of 85 cubic cm and mass of 2.12 grams. What is the density of the substance.
B 2.5 g/cm3
200
What is condensation?
the phase change in which gas to liquids: condensation releases heat energy to the surrounding.
200
what is melting point?
the temperature at which a substance begins to change phases from solid to liquids
200
what is solution
a mixture in which a solute is dissolved by a solvent salt water are solution.
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.
A pot of water boils a heated stove-vaporization Water vapor forms frost on a window- deposition Water vapor in a could turn into rain - condensation Ice in Antarctica goes realty in to the atmosphere- sublimation
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?
D temperature
300
what is density?
the amount of mass in a given volume.
300
what is phase
a state of matter one of the different shapes of the moon as it progresses though one- month cycle, as seen from the Earth.
300
what is solvent?
the substance that dissolves a solute to from a solution.
300
review the description of how particles act during the phase change from solid to liquid. Suggest why irons melting point is much higher than water's, and why nitrogen's is so much lower than both irons and water.
Irons melting point us higher than water because the attraction of iron atoms is stronger than water. Nitrogen 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 gas a mass of 226 g?
C 20 cm 3
400
what is deposition?
the phase change in which a gas becomes a solid bypassing the liquid phase the placement of sediment to produce land forms.
400
what is physical change.
change in physical properties of a substance such as mass, volume, shape, or density, without changing the substance itself.
400
what is sublimation?
the phase change in which solid becomes a gas bypassing the liquids phase.
400
At sea level, water boils at 100 C. On top of Mount Everest, water boils at 71 C. Explain the difference.
Air pressure decreases with altitude so vapor pressure at which water boils also decreases as altitude increase
400
What phase of matter has a definite volume but no definite volume but no definite shape?
B liquid
500
what is heat energy?
the ability to generate a force that does work.
500
what is solubility?
the amount of a substance that will dissolve in a given amount of another substance.
500
what is temperature?
the measurement of the average energy of motion of the particles of matter in a substance.
500
In 10 kg of iron melts at 1538 C, at what temperature will 5 kg of iron melt.
1538 degrees C but the same requires more energy.
500
What processes lets you see your breath when the air is cold?
B condensation