Question

Directions: The diagram shows a cooling curve for a substance. Use the diagram to answer any questions that follow.



What is the substance's temperature at the boiling point?

(1 point)
Responses

425°C
425°C

175°C
175°C

10°C
10°C

337°C
337°C
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Answer 1

To determine the temperature at the boiling point of the substance using the cooling curve, we would typically look for the temperature where the phase change from liquid to gas occurs, which is represented by a plateau or horizontal line on the cooling curve.

Without the diagram, I'm unable to see the specific cooling curve; however, if I were to guide you based on common substances:

- For water, the boiling point is typically 100°C.
- For other substances, it can vary significantly, e.g. ethanol boils at about 78°C, while substances with higher boiling points can have boiling points well over 200°C.

Based on the options provided, if you're looking for a reasonable boiling point among the choices of 425°C, 175°C, 10°C, and 337°C, 175°C could be a plausible boiling point for certain organic solvents or substances.

Please refer to the cooling curve diagram directly to identify the boiling point accurately based on the temperature plateau observed.