https://file.aiquickdraw.com/mathbot/file/1726509580535c73ewy2h.jpg

Answer has to be integer or decimal with three significant digits

Looking at the heating curve in the image you uploaded, the key points where phase changes occur can help us identify the melting temperature.

### To determine the melting temperature (\(T_m\)):
1. **Melting Point (Phase Change from Solid to Liquid):** 
   - The heating curve shows flat (horizontal) sections at phase changes because temperature remains constant as energy goes into the phase transition rather than heating the substance further.
   - From the graph, it appears that the flat section corresponding to the transition from solid to liquid is around **41°C**.

Since the question asks for the melting temperature, the answer would likely be **41.0°C**, which aligns with the provided format requirements (three significant digits).

Would you like more details on how heating curves work, or help with any other questions?

### Related Questions:
1. What is the boiling point of the substance according to the graph?
2. What happens to the energy during the flat segments of the heating curve?
3. How does the slope of the heating curve relate to the specific heat capacity of the substance?
4. What factors could shift the melting or boiling points of a substance?
5. Why does temperature remain constant during a phase change?

**Tip:** On heating curves, horizontal lines always represent phase changes where temperature remains constant.

If the substance is a solid at -2.5°C, what is its melting temperature (Tm)?

Learn how to determine the melting temperature of a substance from a heating curve. This problem focuses on phase transitions and the analysis of heating curves, including key thermodynamic concepts. Suitable for students in Grades 10-12.

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