SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Because the molecules of water take in all the heat to their nucleus
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Because heat is not the same thing as temperature
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Because adding heat doesn’t ever change the temperature of water
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Because all of the energy is used to overcome the attraction of molecules
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Detailed explanation-1: -Since the energy involved in a phase changes is used to break bonds, there is no increase in the kinetic energies of the particles, and therefore no rise in temperature.
Detailed explanation-2: -DURING THE PHASE CHANGE, HEAT IS BEING ABSORBED BUT THE TEMPERATURE DOES NOT CHANGE BECAUSE THE HEAT IS USED TO “UNHINGE” THE INTERPARTICLE FORCES. THERE IS NO CHANGE IN THE KINETIC ENERGY OF THE PARTICLES AND THEREFORE NO TEMPERATURE CHANGE.
Detailed explanation-3: -But there is no temperature change until a phase change is complete. i.e. during phase change, the energy supplied is used only to separate the molecules; no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, since kinetic energy of molecules remains the same.
Detailed explanation-4: -Energy is required to melt a solid because the cohesive bonds between the molecules in the solid must be broken apart such that, in the liquid, the molecules can move around at comparable kinetic energies; thus, there is no rise in temperature.
Detailed explanation-5: -Summary. The temperature of a substance remains constant while a phase change occurs.