When a substance undergoes fusion it melts. Heat is added to a substance but its temperature does not rise.
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A substance that undergoes change in a chemical reaction is called a reactant.
. View the full answer. We review their content and use your feedback to keep the quality high. Fusion- Direct change between a solid and liquid solid - liquidtransitions Melting solid - liquid or Freezing liquid - solid Most of the energy gained by a substance during a phase changegoes into the rearrangement of the molec.
Answer 1 of 2. B The substance must be a non-perfect solid. When a substance undergoes a phase changeChanges occur in the intermolecular forces of attraction and hence the intermolecular space.
When a substance undergoes fusion it a Evaporates O b Freezes O c Condenses d Vaporizes e Sublimes. Fusion is a physical process. For this process to take place heat is being applied to the solid substance and the particles of the solid loose then move freely thereby reducing the intermolecular forces in the.
When some substance such as granite or iron or glass which is normally in a solid phase at room temperature is heated to the point that it melts it is then described as molten. In this case when heat is applied to the system its temperature value will not change. Experts are tested by Chegg as specialists in their subject area.
The process of a solid becoming a liquid is called melting an older term that you may see sometimes is fusion. At low temperatures most substances are solid. A the fumes emitted from moth balls b the mist produced by liquid nitrogen.
Which one of the following statements provides the best explanation for this observation. Heat is added to a substance but its temperature does not rise. When a substance undergoes fusion it a freezes.
The specific heats for the solid liquid and gaseous. For any pure substance the temperature at which melting occurs known as the melting point is a characteristic of that substance. C The substance undergoes a change of phase.
It requires energy. Complete the following statement. 100 4 ratings Transcribed image text.
A The substance must be a gas. Notably the added heat to the system will involve in an increase of potential. The opposite process a liquid becoming a solid is called solidification.
At higher temperatures still they become gaseous. The substance must be cooler than its environment. As the temperature increases they become liquid.
The substance has unusual thermal properties. The substance undergoes a change of phase. The substance must be a gas.
The process of a solid becoming a. Questo 2011 polnt Saved Complete the following statement. The process of fusion of substances takes place during the conversion of a solid substance into a liquid.
This is the rate at which a substance undergoes a chemical change. The opposite process a liquid becoming a. Which one of the following statements provides the best explanation for this observation.
A substance has a melting point of 20A C and a heat of fusion of 36x104 Jkg The boiling point is 150 celcius and the heat of vaporization is 72x104 Jkg at a pressure of one atmosphere. For eg for the conversion of water into its vapour stateits molecules absorb heat energy and start moving more randomly and in more intense ma. When a system undergoes phase changes such solid to liquid or liquid to gas the temperature of the system will remain constant.
C The substance undergoes a change of phase. This is called reaction rate. The process of a solid becoming a liquid is called melting an older term that you may see sometimes is fusion.
Which one of the following phrases is an example of sublimation. D The substance has unusual thermal properties. Using the heat of vaporization of water 540 calg the specific heat of water and the heat of fusion of water 80 calg find the total heat in calories that are released when a 250 g sample of steam at 100 º Celsius condenses and cools to 0 º.
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