### Type of Change

The transition of carbon dioxide from a solid (dry ice) to a gas at -78.5°C is classified as a **physical change**.

### Explanation

1. **Definition of Physical Change:** A physical change involves a change in the state of matter without any alteration in the chemical composition of the substance.

2. **Transition Process:** In this case, dry ice (solid carbon dioxide) undergoes sublimation, which means it changes directly from solid to gas upon heating. This process retains the chemical identity of carbon dioxide; it remains CO₂ before and after the change.

3. **Comparison with Chemical Reaction:** A chemical reaction would involve a transformation where new substances are formed, differing from the original substance. For example, combustion of carbon compounds leads to new products like carbon dioxide and water, which is not the case here.

### Conclusion

Therefore, the correct answer is that the change from solid dry ice to gas is a **physical change**.

Question

### Type of Change

The transition of carbon dioxide from a solid (dry ice) to a gas at -78.5°C is classified as a **physical change**.

### Explanation

1. **Definition of Physical Change:** A physical change involves a change in the state of matter without any alteration in the chemical composition of the substance.

2. **Transition Process:** In this case, dry ice (solid carbon dioxide) undergoes sublimation, which means it changes directly from solid to gas upon heating. This process retains the chemical identity of carbon dioxide; it remains CO₂ before and after the change.

3. **Comparison with Chemical Reaction:** A chemical reaction would involve a transformation where new substances are formed, differing from the original substance. For example, combustion of carbon compounds leads to new products like carbon dioxide and water, which is not the case here.

### Conclusion

Therefore, the correct answer is that the change from solid dry ice to gas is a **physical change**.

Knowee AI · Accepted Answer

### Type of Change

The transition of carbon dioxide from a solid (dry ice) to a gas at -78.5°C is classified as a **physical change**.

### Explanation

1. **Definition of Physical Change:** A physical change involves a change in the state of matter without any alteration in the chemical composition of the substance.

2. **Transition Process:** In this case, dry ice (solid carbon dioxide) undergoes sublimation, which means it changes directly from solid to gas upon heating. This process retains the chemical identity of carbon dioxide; it remains CO₂ before and after the change.

3. **Comparison with Chemical Reaction:** A chemical reaction would involve a transformation where new substances are formed, differing from the original substance. For example, combustion of carbon compounds leads to new products like carbon dioxide and water, which is not the case here.

### Conclusion

Therefore, the correct answer is that the change from solid dry ice to gas is a **physical change**.

Carbon dioxide changes from a solid – dry ice – to a gas at -78.5°C. Determine what type of change this is. Physical changeChemical reactio

Question

Carbon dioxide changes from a solid – dry ice – to a gas at -78.5°C. Determine what type of change this is.

Solution

Type of Change

Explanation

Conclusion

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