Question

1. syrup is very _______________.homogeneous (homo) or heterogeneous (hetero.)26. saltwater27. trail mix28. salad dressing29. lemonade30. peanut butter31. hot cocoa with marshmallowsphysical property (p) or a chemical property (c).32. fragrance of a flower33. flammability of a substance34. ability to rot35. density of an objectlabel each of the following as a physical change (p) or a chemical change (c).36. burning popcorn and making water37. inflating a tire38. rusting of a fishing pole39. boiling waterheating curve of waterlabel the heating curve

Explanation:

Step1: Classify mixtures (HOMO/HETERO)

Homogeneous mixtures have uniform composition; heterogeneous have distinct parts.

• 25. Syrup: homogeneous (uniform throughout)
• 26. Saltwater: homogeneous (salt fully dissolved)
• 27. Trail mix: heterogeneous (distinct components)
• 28. Salad dressing: heterogeneous (separates into layers)
• 29. Lemonade: homogeneous (sugar/lemon dissolved evenly)
• 30. Peanut butter: homogeneous (uniform texture, well-mixed)
• 31. Hot cocoa with marshmallows: heterogeneous (marshmallows are distinct solid pieces)

Step2: Classify properties (P/C)

Physical properties are observable without changing substance identity; chemical properties involve chemical change.

• 32. Fragrance of a flower: P (observed via smell, no chemical change)
• 33. Flammability of a substance: C (involves combustion, a chemical reaction)
• 34. Ability to rot: C (rotting is a chemical decomposition)
• 35. Density of an object: P (measured without altering the object)

Step3: Classify changes (P/C)

Physical changes don't create new substances; chemical changes form new matter.

• 36. Burning popcorn and making water: C (burning creates new compounds; water formation from combustion is chemical)
• 37. Inflating a tire: P (only air is added, no new substance)
• 38. Rusting of a fishing pole: C (rust is a new iron oxide compound)
• 39. Boiling water: P (water changes from liquid to gas, no new substance)

Step4: Label heating curve of water

Heating curve stages: solid heating, melting, liquid heating, boiling, gas heating.

• #1: Solid ice heating (temperature rises, no phase change)
• #2: Melting (ice → liquid water, constant temp)
• #3: Liquid water heating (temperature rises, no phase change)
• #4: Boiling (liquid water → water vapor, constant temp)
• #5: Water vapor (gas) heating (temperature rises, no phase change)

Answer:

Mixture Classification:

1. homogeneous (HOMO)
2. homogeneous (HOMO)
3. heterogeneous (HETERO.)
4. heterogeneous (HETERO.)
5. homogeneous (HOMO)
6. homogeneous (HOMO)
7. heterogeneous (HETERO.)

Property Classification:

1. P
2. C
3. C
4. P

Change Classification:

1. C
2. P
3. C
4. P

Heating Curve Labels:

#1: Solid ice (heating)
#2: Melting (ice to liquid water)
#3: Liquid water (heating)
#4: Boiling (liquid to water vapor)
#5: Water vapor (heating)