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WorksheetsClassification of Matter
Total questions: 13
Worksheet time: 7mins
Solutions are formed when a solvent is used to dissolve a solute. When water is used as a solvent to dissolve a certain solute, the amount of solute that can dissolve in a 100 mL sample of water is higher when the temperature of the water is increased. Which statement best explains this behavior?
Steam is better at dissolving substances than liquid water.
Heating water increases the thermal energy which causes the chemical reaction to happen faster.
Heated water has more energy to overcome the attractive forces between the particles of the solute.
Water that is a higher temperature has a greater volume, so there is more of it to dissolve the solute.
Adding heat to liquid water will increase the temperature until the water reaches the boiling point. Why does the temperature remain constant for a while once the boiling point is reached?
The added energy is reflected by some of the water molecules.
The added energy breaks the bonds in water to form hydrogen and oxygen gases.
The added energy is breaking the bonds of attraction between individual water molecules.
The added energy is blocked from entering the water molecules by their high energy.
The graph shows the temperature of H2O changing over time as it is being heated.
Which of the following statements describes the changes in energy during Interval 4?
The thermal energy that is added is increasing the kinetic energy of the solid H2O, changing the solid H2O into liquid H2O.
The thermal energy that is added is changing the potential energy of the liquid H2O, overcoming the attractive forces between the molecules and changing the liquid H2O into gaseous H2O.
The thermal energy that is added is changing the potential energy of the solid H2O, overcoming the attractive forces between the molecules and changing the solid H2O into liquid H2O.
The thermal energy that is added is increasing the kinetic energy of the liquid H2O, changing the liquid H2O into gaseous H2O.
You can make many types of crystals when you cool supersaturated solutions. How do you make a supersaturated solution in the first place?
Heat the solute, then stir it into the cold solvent.
Heat the solvent, stir in the solute, then cool the resulting mixture.
Make sure the solute and solvent are exactly the same temperature before mixing them.
Add equal parts of solute and solvent, then stir continuously to keep the solute from settling o
A plumber is using a heat gun to get rid of ice that has built up inside a pipe. How will the temperature of the ice change as thermal energy is added to it?
The temperature will increase continuously until all the water has boiled off.
The temperature of the ice will increase continuously until all the ice has melted, and will then remain constant.
The temperature of the ice will increase until it reaches the melting point, and will then remain constant until all the ice is melted.
The temperature of the ice will increase until it reaches the melting point, and will then remain constant until all the water has boiled off.
What properties of the state of matter exist at interval 1 on the diagram?
definite shape and definite volume
indefinite shape and definite volume
indefinite shape and indefinite volume
This information cannot be determined by the graph.
How are homogeneous mixtures different from heterogeneous mixtures?
Homogeneous mixtures involve exothermic chemical reactions.
Homogeneous mixtures have an even distribution of particle types.
Homogenous mixtures are made from more than one substance.
Homogeneous mixtures have an uneven distribution of particle types.
The diagram shows how the temperature of water changes as thermal energy is transferred from the water to its surroundings.
What happens during interval 2?
Hydrogen gas and oxygen gas release thermal energy as they form liquid water.
Kinetic energy is being transformed into thermal energy.
Water molecules move closer together, transforming potential energy into thermal energy.
The kinetic energy of the water molecules is increasing as thermal energy is being released.
Use the graph of mass vs. volume below to determine which statement about the substances is correct.
Substance Y has a greater density than Substance W because 50 grams of Y take up less space than 50 grams of W.
Substance Z has the greatest density because it has the largest volume.
Substance X has a low density that ranges from 0 grams to 100 grams.
Substance W has a lower density than Substance Z because Substance W has a higher mass-per-volume ratio.
Solutions are formed when a solvent is used to dissolve a solute. When water is used as a solvent to dissolve a certain solute, the amount of solute that can dissolve in a 100-mL sample of water is lower when the temperature of the water is decreased.
Which statement best explains this behavior?
Ice is better at dissolving substances than liquid water
Cooler water has less energy to overcome the attractive forces between the particles of the solute than warmer water.
Cooling water decreases the thermal energy, which causes the chemical reaction to happen faster.
Water that is at a lower temperature has a smaller volume, so there is less of it to dissolve the solute.
Removing thermal energy from gaseous water will decrease the temperature until the water reaches the boiling point. Why does the temperature remain constant for a while once the boiling point is reached?
Energy is released as gaseous hydrogen and oxygen combine to form water.
The released energy breaks the chemical bonds of the water molecules forming elemental hydrogen and oxygen.
Energy is released as the molecules move closer together and the potential energy decreases.
The released energy decreases the kinetic energy of the particles.
Based upon the graph of mass vs. volume below, which statement about the density is correct?
Substance Y has the greatest density because 40 mL of Y has a greater mass than 40 mL of any other substance on the chart.
Substance Z has the greatest density because 40 g of Z has a greater volume than 40 g of any other substance on the chart.
Substance X has a density that varies from 0 to 100.
Substance W has a density that varies from 0 to 110.
Which of the following statements describes the changes in energy during Interval 2?
The thermal energy that is added is changing the potential energy of the solid H2O, overcoming the attractive forces between the molecules and changing the solid H2O into liquid H2O.
The thermal energy that is added is increasing the kinetic energy of the solid H2O, changing the solid H2O into liquid H2O.
The thermal energy that is added is changing the potential energy of the liquid H2O, overcoming the attractive forces between the molecules and changing the liquid H2O into gaseous H2O.
The thermal energy that is added is increasing the kinetic energy of the liquid H2O, changing the liquid H2O into gaseous H2O.
