0
What happens to the molecules in a substance when energy is added?
Wiki User
∙ 11y ago
It depends what substance you mean and to what extent it is heated. Each material has a generally different melting points, and some changes made to the materials are different. Say you mean metal was heated to melting point, it would of course melt. I just heated some grated cheese in a 1000W microwave and most of it was melted in 50 seconds, it would have completely melted given 20 more seconds. I tried the same thing a while ago with a thin porcelain plate for my beverage and withing 15 or so seconds the plate broke in half, no conatact was made to it by me or pretty much any other substance, it was the heat that had done it. Now, if you heat an egg, it cooks and that is irreversible, it will always be cooked. If you melt metal through heating it, it will be liquid metal and that is a reversible change made, for it will solidify if allowed to cool. Of course some things as well may hardly heat at all, like wood, which is an insultor of heat, it will take hours or less to heat depending on how you heat it, but mostly the wood will just heat up, and soften maybe. That is the same with plastic which I had my ready meal in, it was cooked for 10 minutes and it softened with heating but hardened once more as it was allowed to cool. Another pint is, as I have discovered, as the food gets heated some times the air under the film lid gets hot s well, and when you lift it scolding steam rises and burns your hand. I welcome anyone to correct my answer, it is poorly written and to my mental capacity it is a complicated question to answer.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What do you call it when oxygen is added to a substance?
When Oxygen is added to a substance it is called oxidation.
As heat is added to a substance undergoing a phase change the temperature remains constant because the energy is being used to?
Overcome intermolecular forces
When oxygen is added to a substance you say that it is?
When oxygen reacts with a substance we say the substance has been oxydized.
How do hydrogen bonds affect heat capacity?
Hydrogen bonds are strong, such as in water. Therefore it take more energy (heat) to bring it to a boiling point (break or weaken the bonds so they are more freely moving as in a gas). Therefore it has a larger heat capacity. The above answer, while mostly correct, is wrong in relating the boiling point of a material to its heat capacity. Heat capacity is a measure of how much energy it takes to increase a specific amount of a substance by 1 °C. It doesn't have anything to do with phase changes as implied by the answer above. The heat capacity of a substance is generally a function of the number of degrees of freedom of the molecule. Larger molecules have more degrees of freedom than do smaller molecules. Heat capacity has to do with how well molecules are able to store (or trap) energy. This can be in translational energy, molecular vibrations and molecular rotations for instance. Hydrogen bonds provide another way for energy to be stored. As heat is added to the substance, some of that energy goes into breaking the bonds rather than simply raising the temperature. The more places a molecule has to deposit energy (degrees of freedom), the higher the heat capacity. See the Wikipedia link to the left for more information.
Which statement best explains what must take place for water to boil?
Water must gain or lose energy (through heat or pressure) in order to change state. When an object is "heated" what is actually happening is the molecules in the sample are speeding up. When it is "cooled" the molecules are slowing down. The same thing happens when the pressure is changed: when you compress something energy is added, and when you expand energy is released. So for water to change state, you need to change the amount of energy in the sample by changing the amount of heat or pressure.
When energy is added to molecules what happens to the substance?
they spread apart and move faster when energy is added.
What happens to molecules as energy is added and the temperature increases?
what happens to molecules as energy is added the temperature increses
What happens to atoms of A substance when heat is added?
When heat is added to a substance, the molecules and atoms vibrate faster.
What best describes what happens to energy and molecules in a stable ecosystem?
Energy is continuously added to the ecosystem and molecules are recycled.
Why may the temperature of a substance change when energy is added?
Thermal energy of a substance is determined by the movement of the molecules and the potential energy of the arrangement of molecules. Heat transfer will stop when thermal equilibrium is reached. It depends upon the substance how long that takes.
What is the separation of particles as heat is added which causes an increase in the size of the substance?
Whenever heat is added to the system, we increase the average kinetic energy of molecules. Increasing the K.E. of molecules cause the molecules to move further apart and collide back even more violently. This can cause size of the substance to increase.
What happens to particles inside of a solid liquid or gas when energy is added compared to when energy is removed?
When energy is added the particles inside the substance vibrate more. Conversely, the vibrate less when energy is removed.
What happens to temperature as energy is added to a substance that is changing state?
The temperature remain constant during the phase changing.
What happens when energy is taken away from matter?
The substance's particals will start slowing down and come closer together. As kinetic energy is removed from a substance, it will do the opposite as when kinetic energy is added to a substance.
What has to be added to a substance to cause a phase change?
Heat energy must be added to or subtracted from a substance to cause a phase change.
What happens to the particles of a substance when energy is added to it?
If they are in a restricted space such as a pop can. The molecules begin bouncing off the wall. This in turn is creating heat and pressure energy. If the heat or pressure become to unstable the can simply explode. This is due to the fact of the limited room the molecules or particles can go. Now if the substance is non aqueous (without water, solid or powder) if you heat it to a certain point you could change the chemical structure of the chemical.
What happens to molecules in ice as thermal energy is added?
they start to move-rotating and vibrating and translating more and more and faster and faster.
