endotherm: An animal that regulates its own internal body temperature through metabolic processes. homeotherm: An animal that maintains a constant internal body temperature, usually within a narrow range of temperatures.
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Endotherms have various ways of increasing metabolic heat production, or thermogenesis, in response to cold environments. One way to produce metabolic heat is through muscle contraction”for example, if you shiver uncontrollably when you’re very cold.
Homeothermic means that they can maintain a constant (high) body temperature. Endothermic means that they can maintain their (high) body temperature by creating heat through metabolic means.
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Latent Heat of Vaporization Form of latent heat where energy flow during the change of phase is from liquid to a gas. The change is endothermic, meaning that the system absorbs energy on going from liquid to gas. The change is exothermic (the system releases energy) when the direction is from gas to liquid.
Latent Heat of Vaporization Form of latent heat where energy flow during the change of phase is from liquid to a gas. The change is endothermic, meaning that the system absorbs energy on going from liquid to gas. The change is exothermic (the system releases energy) when the direction is from gas to liquid.
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A phase change is a physical process in which a substance goes from one phase to another. Usually the change occurs when adding or removing heat at a particular temperature, known as the melting point or the boiling point of the substance.
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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.
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Explanation: Boiling is a phase change from liquids to gas. Therefore we are looking for a segment that is flat (because the potential energy is increasing) and that is between the liquid and gas phases. In this case, gas phase is the highest energy phase, and liquids is the next highest.
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By adding energy, solids can change from an ordered arrangement to a less ordered arrangement (liquid), and finally to a very random arrangement of the particles (the gas phase). Each phase change has a specific name, based on what is happening to the particles of matter.
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Phase changes are physical changes that take place when matter changes energy states, but chemical bonds are not broken or formed.
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Phase changes are changes that occur when substances are melted, frozen, boiled, condensed, sublimated, or deposited. They are also physical changes because they do not change the nature of the substance.
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The heat energy added during the phase change is used to overcome some of the forces that hold the molecules together, allowing them to move further away from each other. During the phase change, the added heat energy is stored as potential energy, or energy of position, as the molecules are now further apart.
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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.
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Explanation: During the phase change, when solid melts into liquid, its temperature remains constant as the heat energy is stored as potential energy. Likewise, as heat is added to a liquid, its temperature increases as the molecules, once again, move faster.
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When a liquid turns into a solid the molecules slow down and begin to vibrate in place. To cause freezing energy must be removed. Because you are removing heat to freeze a substance it is called a exothermic change. The point at which this happens is called the freezing point.
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The phase changes are due to the particles’ behaviour. Ultimately, when a particle gains energy (AKA increase temperature), the atomic attraction becomes weaker and causes a change to the matter. This results in a change from solid -> liquid -> gas. The opposite occurs for gas -> liquid -> solid.
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Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt. During a phase change energy my be added or subtracted from a system, but the temperature will not change.
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Q: Why is energy always involved in changes of state? A: The energy of particles of matter determines the matter’s state. Particles of a gas have more energy than particles of a liquid, and particles of a liquid have more energy than particles of a solid.
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The study of energy changes (particularly heat) in chemical reactions is known as chemical thermodynamics. This is also sometimes called thermochemistry.
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Energy can change from one form to another. For example, when you switch on a lightbulb, electrical energy changes to thermal energy and light energy. A car changes energy stored in the chemical bonds of gasoline to several different forms.
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The internal energy is the sum of the kinetic energy of the molecules and the chemical potential energy of the molecules. During a change of phase, the average kinetic energy of the molecules stays the same, but the average potential energy changes.
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They are changes in bonding energy between the molecules. If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance. The example we will use here is ice melting into water.
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During a phase change, the number of degrees of freedom changes, and so does the specific heat capacity. Heat capacity can also depend on temperature within a given phase, but many substances, under constant pressure, exhibit a constant specific heat over a wide range of temperatures.
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Phase transitions play an important theoretical and practical role in the study of heat flow. In melting (or “fusion”), a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
Why does Pennywise look like a clown?
Phase transitions involving the breaking of intermolecular attractions (i.e., fusion (melting), vaporization, and sublimation) require an input of energy to overcome the attractive forces between the particles of the substance.
Why does Pennywise eyes change color?
Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it to become ice (a solid).