For most substances, it's the same temperature. For example, ice melts at 0°C (273K), and water freezes also at 0°C.
A few substances, such as agar, have a hysteresis. For example, agar melts at 85°C; to solidify it again, you have to cool it down to about 32-40°C.
Yes, the temperature of a substance will vary while it is melting or freezing. Water will get cold when it freezes. Items that are melting heat up.
Yes. A substance melts and freezes at the same temperature. Melting is as it changes from solid to liquid, freezing is from liquid to solid.
Temperature of a substance does not change when it in the process of freezing. Temperature will continue to decrease once the substance is completely frozen (solid).
When a substance is melting the temperature gets higher. This is because the molecules are beginning to spread out more and more.
The more the substance, the longer and higher temperature it will take to melt/boil/freeze/condense.
In theory, for the same substance they should be the equal. In actuality, there are slight variations. From a general chem class perspective however, the answer is yes.
No, they are the same. It just depends on whether heat energy is being gained or lost.
It remains constant.
the temperature changes
it decreases.
It is indeed possible for a substance to have a higher melting point than expected. This normally happens when the substance is impure.
The answer is that the temperature a substance freezes is also its melting point. Water freezes at 0 degrees Celsius into ice and if you heat ice up to 0 degrees Celsius it MELTS to give you water. Evaporation is the change from liquid to gas and condensation is the change from gas to liquid (for water this happens at 100 degrees Celsius).
Changes the temperature of the substance
Simply, the melting point. Think of an ice cube. The melting point is the temperature at which the ice cube MELTS into a liquid.
it decreases.
Check the melting point of the substance. If the melting point is below room temperature, then the substance is liquid and if the melting point is above room temperature then it is solid.
what the heck are you asking? the melting point is not a substance. it's a temperature in which the substance starts to melt
This is the definition of the melting point of an element or substance. The melting point is when a solid begins to turn into a liquid. A substance also has a boiling point and freezing point.
It is the boiling point of the substance.
The temperature of the environment and the melting and evaporation temperature of the substance.
= temperature at which (all of) a (pure) substance is melting: going from solid into liquid phase.
= temperature at which (all of) a (pure) substance is melting: going from solid into liquid phase.
Both indicate the temperature at which the solid and liquid states of a substance are in equilibrium.
It is the melting point of the substance.
As the heat content increases, the temperature of the substance will rise. However, if the substance is not at its melting or boiling point, it will not undergo a phase change. Instead, its temperature will continue to increase until it reaches its melting or boiling point, at which point a phase change will occur.
Celsius is a measure of temperature not a substance, and therefore it has no melting point. What is the melting point of what material in Celsius? [You haven't named the substance you want the melting point of/for]