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Why the temperature remains constant during melting although heat is absorbed?
Wiki User
∙ 6y ago
Liquids in equilibrium with solids have a higher enthalpy even though the Gibbs free energy is zero for the transition. Some energy has to be added in order to make the transition but it does not go into speeding up the molecules - rather it goes into breaking the bonds holding the molecules in place in the solid so the temperature does not rise.
Wiki User
∙ 12y ago
Wiki User
∙ 8y agoThe heat being added is used as the latent heat of fusion necessary to produce the phase
change from ice / solid H2O to liquid H2O.
h sub sf = latent enthalpy of fusion = 334 J/g = 144 Btu/ lbm for water at 0.0 C
Wiki User
∙ 14y agothis happens because all of the heat is absorbed in turning the solid into liquid
Wiki User
∙ 13y agoBecause all the heat energy going into the ice is being used to melt it rather than raise its temperature. This is known as the heat of fusion.
Wiki User
∙ 11y agoDuring a phase change, the temperature remains constant until the entire phase change has taken place. The energy that is being absorbed goes into causing the phase change.
Wiki User
∙ 11y agobecause it is coled
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What happens when the temperature stays the same in a melting curve?
During melting the temperature remain constant if it was achieved the melting point.
Ice melts at o degree centigrate the temperature remain constant at o degree centegrate until all the ice has melted suggest why the temperature remains constant during melting although heat is abs?
At melting point of a substance the supplied heat is utilized to change the state so temperature remains constant till all the material is converted into liquid, this is known asLatent heat of fusion.
Explain what happens to the temperature of an ice cube as it melts?
Temperature of melting iceis a constant property: it does not change during melting (stays 0oC, this is even one of the the defined value of the Celsius temperature scale)(for any other melting solid the same is valid at each melting point temperature)
Do melting and freezing take place at fixed temperature?
Provided other environmental factors remain constant, yes.
When does a substance donot change its temperature even if it is heated?
During a phase change, a substance will remain at a constant temperature while it is being heated. In the case of melting ice, the heat initially goes into separating water molecules from the ice lattice, which is melting. During that time, the heat goes into continued melting of the ice and the temperature remains constant. Once all of the ice is melted, adding additional heat will increase the temperature of the now liquid water.
What happens when the temperature stays the same in a melting curve?
During melting the temperature remain constant if it was achieved the melting point.
What is the constant in a experiment on melting rate of ice?
temperature
Ice melts at o degree centigrate the temperature remain constant at o degree centegrate until all the ice has melted suggest why the temperature remains constant during melting although heat is abs?
At melting point of a substance the supplied heat is utilized to change the state so temperature remains constant till all the material is converted into liquid, this is known asLatent heat of fusion.
Explain what happens to the temperature of an ice cube as it melts?
Temperature of melting iceis a constant property: it does not change during melting (stays 0oC, this is even one of the the defined value of the Celsius temperature scale)(for any other melting solid the same is valid at each melting point temperature)
What is the melting point temperature?
The temperature at which the solid melts, which remains constant until all of the substance is melted.
Do melting and freezing take place at fixed temperature?
Provided other environmental factors remain constant, yes.
What can you use to keep ice from melting?
A vaccum flask,since it can the temperature of it's content constant.
When does a substance donot change its temperature even if it is heated?
During a phase change, a substance will remain at a constant temperature while it is being heated. In the case of melting ice, the heat initially goes into separating water molecules from the ice lattice, which is melting. During that time, the heat goes into continued melting of the ice and the temperature remains constant. Once all of the ice is melted, adding additional heat will increase the temperature of the now liquid water.
Does a substances temperature change when it is changing state?
No. During a phase change, a substance will remain at a constant temperature until the change is complete. In the case of melting ice, the heat initially goes into separating water molecules from the ice lattice, which is melting. During that time, the heat goes into continued melting of the ice and the temperature remains constant. Once all of the ice is melted, adding additional heat will increase the temperature of the now liquid water.
Why does the temperature become constant at the point of melting till the whole substance of a solid melted?
That happens because any heat that is added to that melting material will be used to cause further melting, until there is nothing left to melt, at which point the added heat can raise the temperature. A solid melts at its melting point; it does not get hotter than the melting point without melting, that's why it is the melting point.
Why we use paraffin for determination of melting point?
Liquid paraffin is used in thermostatic baths, to maintain a constant temperature.
Do compounds have fixed temperature?
No. If you think about melting or boiling point, these values are specific and constant for each compound (with some exceptions).
