Question

If the melting and boiling points of methanol are −98 °C and 65 °C , respectively, what phase is methanol in at −100 °C ?

Answer 1

At -100 °C, methanol is in the solid phase because this temperature is below its melting point of −98 °C.

Step-by-step explanation:

If the melting and boiling points of methanol are −98 °C and 65 °C, respectively, then at −100 °C, methanol would be in a solid phase. This is because the temperature is below the melting point of methanol, which means that it has not reached the energy level required to transition from a solid to a liquid. Remember, a substance remains in a solid state until it reaches its melting point. Once a substance reaches its melting point, it can exist in both the solid and liquid phases until it fully converts to liquid upon further heating.

Answer 2

Methanol is at solid phase at -100°C

Step-by-step explanation:

Melting point = -98°C

This is the temperature that methanol starts to melt.. Al lower temperatures than this, methanol is solid.

-98°C < Methanol < 65°C → Liquid phase

Methanol < 65°C → Gas phase

65°C is the boiling point of methanol