CH-406
Purity and melting point
Chemistry · Secondary 3 · Easy · Purity and melting point
A student heats 5.00 g of a pure substance. Its temperature rises from 20 °C to 80 °C and then stays constant at 80 °C while it continues to melt.
What does the constant temperature at 80 °C show about the substance?
What does the constant temperature at 80 °C show about the substance?
- It is impure and has no fixed melting point.
- It is pure and melts at 80 °C.
- It decomposes at 80 °C.
- It boils at 80 °C.
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