Which Sentence Describes an Example of Sublimation?
Confused about scientific concepts like sublimation, energy transfer, or phase changes? Get clear examples and simple explanations to grasp complex topics easily.
If you’re a student and working on experiments or studying for a test, we’ll guide you through understanding chemical properties, energy conversions, and investigation techniques. Find answers that make science straightforward.
Sublimation might sound complex, but it’s a natural process you can see daily. Sublimation is when a solid changes directly into a gas without becoming a liquid first. Let’s include examples, interesting facts, and science news.
What Is a Good Example of Sublimation?
One of the most well-known examples of sublimation is dry ice. Dry ice, made of frozen carbon dioxide, transforms directly from a solid into carbon dioxide gas when exposed to room temperature. If you’ve ever seen that smoky fog effect at parties or in science demonstrations, that’s sublimation in action!
Other examples include:
- Snow disappearing without melting on a sunny but freezing day.
- Air fresheners that shrink over time, releasing their fragrance into the air.
- Iodine crystals, which when heated, change directly into a violet gas.
- Refrigeration: Keeping items cold during shipping without leaving liquid residue.
- Special effects: Creating dense fog in theaters or parties when exposed to water.
- Scientific demonstrations: To showcase sublimation as a physical change.
Here are 4 more examples of sublimation:
Sublimation Sentence Examples
It helps to see sublimation used in context. Check out these example sentences to understand it better:
- The dry ice sublimated rapidly, leaving no puddle behind.
- On cold, sunny days, snow sublimates, disappearing without melting.
- The solid air freshener sublimates slowly over weeks, leaving no residue.
Each sentence highlights different real-life moments when sublimation happens, helping you spot the process easily.
Which Sentence Describes an Example of Sublimation Class?
In a class discussion, you might encounter a question like:
“Which sentence describes an example of sublimation?”
An ideal answer could be:
“The block of dry ice disappeared, turning directly into gas without any liquid.”
Sorting Energy Transfer Processes
To better understand sublimation, let’s compare it with other energy-related changes. Sublimation requires energy absorption to break molecular bonds, changing the solid into a gas. This is similar to melting, but different from processes like freezing, which release energy.
| Process | Energy Transfer | Phase Change |
|---|---|---|
| Melting | Absorbs energy | Solid → Liquid |
| Freezing | Releases energy | Liquid → Solid |
| Sublimation | Absorbs energy | Solid → Gas |
When you’re sorting processes based on energy transfer, sublimation belongs to the category of endothermic reactions, those that absorb energy.
Sublimation Through Real-Life Examples
- Winter Frost:
- Imagine a crisp winter morning with frost on the grass and trees.
- As the sun rises, the frost disappears without melting into water.
- Example Sentence: “The frost on the grass disappeared directly into the air as vapor when the sun rose.”
- Dry Ice:
- Dry ice is solid carbon dioxide.
- At room temperature, it changes directly into carbon dioxide gas.
- Used for creating calm, smoky effects at parties and in stage shows.
Why Does Sublimation Happen?
Sublimation occurs under specific conditions, typically low pressure or when heat is applied to allow the solid to become a gas. Here’s a quick overview:
| Condition | Description |
|---|---|
| Low Pressure | Reduces the energy needed for molecules to escape solid form. |
| Heat Application | Provides the energy required for the solid to transition directly to gas. |
Practical Applications of Sublimation
- Food Preservation:
- Freeze-Drying:
- Food is frozen and then placed under low pressure.
- The frozen water in the food sublimates, preserving the food’s structure and nutritional content.
- Freeze-Drying:
- High-Purity Chemical Manufacturing:
- Purification:
- Sublimation can purify substances since impurities usually do not sublimate.
- This process separates the desired material from impurities.
- Purification:
Interesting Facts
- Fascinating Frost:
- Frost sublimation occurs because the sun’s energy provides enough heat for the ice to turn directly into vapor.
- Dry Ice Details:
- Dry ice sublimates at -78.5°C (-109.3°F), making it perfect for creating fog effects without leaving any liquid residue.
Sublimation in the News
- Advancements in Freeze-Drying Technology:
- Recent innovations have made freeze-drying more efficient and affordable, benefiting the food industry and pharmaceuticals.
- Environmental Impact of Dry Ice:
- Researchers are exploring eco-friendly alternatives to dry ice in various industries to reduce carbon footprints.
Which Sentence Describes an Example of Sublimation Brain or Qui?
Questions on sublimation often appear in quizzes (or “qui” for short) and learning apps, requiring quick thinking. Example questions might ask:
“Martina has a sample of dry ice that disappears without melting. Which sentence best describes this process?”
The answer: “The dry ice sublimates, transforming directly from a solid to a gas.”
This response shows how sublimation applies in real-world contexts, making it easy for students like Martina to grasp the concept.
What Happens to Water When It Changes to Ice?
Water undergoes freezing when it changes from liquid to solid, which is the opposite of sublimation. Freezing involves the release of energy, while sublimation requires energy absorption. Both are phase changes but involve different energy flows.
Other Related Investigations
When working on science projects, you might encounter questions like:
- “Which property of a substance can be determined using a pH indicator?”
pH indicators measure the acidity or alkalinity of a solution, giving insight into the substance’s chemical properties. - “Lyndon is investigating whether putting plastic on a cold surface changes temperature readings.”
This experiment would involve studying heat transfer, similar to how we analyze sublimation through energy absorption.
Comparing Sublimation to Other Phase Changes
Sublimation vs. Melting and Freezing
Sublimation
- Sublimation: Transition from solid to gas, skipping the liquid phase.
- Energy Requirement: Solid gains enough energy to bypass both solid and liquid intermolecular forces.
- Example: Dry ice (solid CO₂) sublimates directly into carbon dioxide gas.
Melting
- Melting: Process where a solid turns into a liquid.
- Energy Requirement: Requires energy to break solid-state bonds, but not enough to reach the gas phase.
- Example: Ice melting into liquid water.
In short, while melting involves an intermediary liquid phase, sublimation skips this phase entirely.
Why Freezing Is the Opposite of Sublimation
Freezing is indeed the opposite of sublimation, and here’s why:
- Freezing converts a liquid into a solid by removing heat, causing the particles to slow down and form a rigid structure.
- Sublimation works in reverse, where a solid gains heat to jump directly to the gaseous state, bypassing the liquid phase altogether.
In essence, freezing is a loss of energy to enter a more structured phase (solid), while sublimation requires a gain in energy to move to a less structured phase (gas).
Sublimation vs. Deposition
Reverse Process: Deposition Defined
- Deposition: The reverse of sublimation, where gas turns directly into a solid.
- No Liquid Phase: Skips the liquid state entirely.
- Example: Frost forms on windows as water vapor loses energy and becomes ice.
When Does Deposition Occur?
- Conditions for Deposition: Happens at low temperatures and high pressure.
- Energy Loss: Gas molecules lose energy and condense directly into a solid.
- Natural Occurrence: Common in below-freezing environments, where water vapor forms ice crystals directly.
Key Differences Table:
| Phase Change | Transition | Energy Requirement | Example |
|---|---|---|---|
| Sublimation | Solid to Gas | Heat gain (endothermic) | Dry ice to CO₂ gas |
| Melting | Solid to Liquid | Heat gain (endothermic) | Ice to water |
| Freezing | Liquid to Solid | Heat loss (exothermic) | Water to ice |
| Deposition | Gas to Solid | Heat loss (exothermic) | Water vapor to frost |
Common Queries:
Which of the following best describes sublimation? When a solid changes directly into a gas without passing through the liquid state.
What is the best definition of sublimation? A phase transition in which a substance goes from a solid state directly to a gaseous state, bypassing the liquid phase.
What is sublimation used to describe? Phase change where materials, like dry ice or frost, transition directly from solid to gas.
Which of the following is sublimation? An example of sublimation is when dry ice (solid carbon dioxide) turns directly into carbon dioxide gas without becoming liquid.
What is a sentence for sublimation? “The frost on the grass disappeared directly into the air as vapor when the sun rose.”
What is easy sublimation? Can be observed when dry ice is left out at room temperature and turns directly into gas, creating a foggy effect.
What is sublimation for dummies? It’s when a solid skips the liquid phase and turns straight into a gas. Think of how dry ice doesn’t melt into water but becomes a misty fog.
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Have you ever noticed sublimation around you? How do you think it could benefit your personal or professional projects? Share your thoughts and experiences in the comments below!
University of California – Santa Barbara: ScienceLine on Sublimation
https://scienceline.ucsb.edu Explains the physics of sublimation and real-world examples like dry ice and iodine.
