Which phase change temperatures are identical on the phase diagram? Select all that apply. freezing point - melting point boiling point - condensation point condensation point - melting point melting point - boiling point

In a phase diagram, certain phase change temperatures are identical because they represent the same transition between phases but in opposite directions. The correct pairs are:<br /><br />1. **Freezing point - Melting point**: These two temperatures are identical because freezing is the process of a liquid turning into a solid, and melting is the process of a solid turning into a liquid. Both occur at the same temperature for a given substance.<br /><br />2. **Boiling point - Condensation point**: These two temperatures are also identical because boiling is the process of a liquid turning into a gas, and condensation is the process of a gas turning into a liquid. Both occur at the same temperature for a given substance.<br /><br />Therefore, the correct answers are:<br />- Freezing point - Melting point<br />- Boiling point - Condensation point