Elements vs Compounds vs Mixtures
Chemical vs Physical Change
Heat Transfers
Rate of Dissolution
Solvent vs Solute vs Solution
Thermal Energy
100
Element
100
Cracking an egg
Physical Change
100
A hot body releases thermal energy into the surroundings through this.
Radiation
100
The smaller the crystals, the more ________ ______ exposed.
surface area
100
A teaspoon of dry coffee crystals are an example of
Solute
100
As the temperature decreases, the particles move __________.
slower
200
Element
200
Cutting hair
Physical Change
200
Heat transfer between two surfaces (particles) that touch each other.
Conduction
200
The smaller the crystals, the __________ they dissolve.
Faster
200
Water is an example of a
Solvent
200
When thermal energy is ____________, temperature decreases.
removed
300
Compound
300
Burning sugar
Chemical Change
300
The particles or objects exchanging heat do not change their positions.
Conduction
300
3 affects the rate of dissolution of a solute are
-Temperature
-?
-Agitation
Surface Area
300
Solute
300
When thermal energy is added, the temperature __________.
increases
400
Mixture of elements and compounds
400
Breaking a glass
Physical Change
400
Feeling warm while standing by a fire.
Radiation
400
The larger the crystals, the ___________ it takes to dissolve.
longer
400
Sugar is an example of a
Solute
400
As the temperature ______________, the particles move slower.
decreases
500
a combination of two or more different elements chemically combined.
Compound
500
Rotting food
Chemical Change
500
Heat gets distributed in gases and liquids by this process.
Convection
500
3 affects the rate of dissolution of a solute are
-?
-Surface area
-Agitation
Temperature
500
A mixture of a solvent and a solute
Solution
500
As the temperature ______________, the particles move faster.
increases
600
Chemicals that are pure substances represented by symbols that have at least one capital letter.
Element
600
Change in color, new substance formed, not easily reversible are properties of what?
Chemical Change
600
Heat gets transferred from one end of a solid to another through this.
Conduction
600
How do using smaller salt crystals affect the rate of making a salt solution in water?
Smaller crystals increase the surface area exposed to the solvent and speed up dissolving.
600
Salt is an example of a
Solute
600
When thermal energy is removed, temperature ______________.
Decreases
700
made up of one type of atom
Element
700
Change in shape, no new substance formed, can be easily reversed are properties of what?
Physical Change
700
Touching a hot bowl of soup
Conduction
700
3 affects the rate of dissolution of a solute are
-Temperature
-Surface area
-?
Agitation
700
What dissolves the particles (powder)?
Solvent
700
What most likely occurs when thermal energy is added from a liquid?
The temperature of the liquid increases.
800
Compounds
800
Two colorless liquids were mixed, and a color change occurred when a new substance was formed. This is an example of a what?
Chemical Change
800
Can take place without any medium between the source and the destination
Radiation
800
What is the concentration in percent of 150 mL total of solution that contains 30 g of solute?
20%
800
Solvents dissolve what
Solutes
800
When thermal energy is __________, temperature increases.
added
900
Elements
900
What kind of change is this, and why?
Chemical Change, because a new substance was created.
900
Warmer portions of the substance rise, allowing cooler portions to come down and take their place.
Convection
900
A saline solution is made by mixing 25 g of salt (NaCl) dissolved in 250 g of water. What is the percent concentration of salt in the solution?
9%
900
Chocolate Milk
Solution of chocolate powder and milk
900
As the temperature increases, the particles move __________.
Faster
1000
Is O2 an element or compound? EXPLAIN why.
Element because even if it is 2, they are the same, so it is only one type of atom.
1000
A new substance created with different properties was produced.
Chemical Change
1000
After playing outside on a cold day, you decided to go inside. When you go inside, you begin to warm up. How does heat transfer apply?
Heat flows from the object with the higher temperature to the object with the lower temperature
1000
A solution contains 50mL of ethyl alcohol mixed with 150 mL of water for a total of 200 mL of solution. Calculate the concentration of the solution.
25%
1000
Particles (powder) that get dissolved
Solute
1000
What most likely occurs when thermal energy is removed from a liquid?
The temperature of the liquid decreases.