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Answered 2015-11-01 21:16:51

As an example, let's assume that ice melts. The energy of the substance increases. Note that ice at 0 °C is converted into water, also at 0 °C - the increase in energy is potential energy, NOT an increase in temperature, which is related to kinetic energy. This potential energy is related to the force it takes to break the bonds between molecules. The potential energy is again released as heat energy when the water freezes again.

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When a substance changes state, Energy within the substance is gained or lost, but the composition is unchanged.


Kinetic Energy is gained in the foward changes and lost in the reverse changes of state


The energy gained (absorbed) by the substance is what causes the melting.


Energy is gained by the solid (endothermic reaction) to make it change state to a liquid.


Melting is a phase change in which a substance changes from the solid state to the liquid state. Changing phases is also a physical change.


When a substance evaporates, it gains energy.


That applies to any energy transformation. No energy is lost or gained.


No energy is gained. On the contrary, energy is required to make ice melt.


Energy is never created or destroyed. All of the energy that flows out of any place or thing has to go somewhere.


You get steam because the molecules have gained energy in the form of heat and are moving faster and further apart which also increases pressure if you try to contain it. It takes in energy


Sublimation occurs when the particles of the substance must move from being very tightly packed to being spread far far apart. Thus, sublimation is an endothermic change because energy is gained by the substance as it changes state


the energy wasted by the system(boiler) is gained by the surrounding atmosphere


Sublimation occurs when the particles of the substance must move from being very tightly packed to being spread far far apart. Thus, sublimation is an endothermic change because energy is gained by the substance as it changes state.


Melting is a phase change in which a substance changes from the solid state to the liquid state. Sublimation is a phase change in which a solid moves directly into the gas phase. Both melting and sublimation are two types of physical change.



You get huge. It changes the chemical into straight testosterone. I gained 35 pounds in a month.


They emit a photon of light equal in energy to the energy gained when they became excited.


The Law of Conservation of Energy states that energy is neither created nor destroyed but remains constant in a given system. Therefore, wouldn't calorimetry make use of it because the energy gained/lost by the water would cancel out the energy lost/gained by the substance and result in no change overall? The Law of Conservation of Energy states that energy is neither created nor destroyed but remains constant in a given system. Therefore, wouldn't calorimetry make use of it because the energy gained/lost by the water would cancel out the energy lost/gained by the substance and result in no change overall?


Chemical energy is a bit more complicated than that. If a substance "has chemical energy", that means that energy can be gained by rearranging that substance with other atoms or molecules - often the oxygen (O2) form the air. Thus, the energy is neither truly stored in the substance you are considering, nor in the oxygen - but in their relationship.


About 55%to60% of energy is gained by alternative energy.


no it says in the law of conservation of energy, energy can not be created or destroyed only changed, but you may loose energy as a different form but you wont gain any


Heat energy cause it stops and let's off all the heat it just gained from the train tracks.


Yes it does. Changing between the forms requires energy to be lost or gained depending on the direction the substance is changing. Changing from solid to liquid or gas and changing from liquid to gas both require inputs of energy to the substance, and changing from gas to liquid or solid or from liquid to solid releases energy from the substance to the environment, all at constant temperature.


They emit a photon of light equal in energy to the energy gained when they became excited.


They emit a photon of light equal in energy to the energy gained when they became excited.



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