which among the following substances has the highest heat conductivity?
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Copper and aluminium have the highest heat conductivity .
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Thermal conductivity is a thermophysical measure of how much heat is transferred through a material by the conductive flow. ... Thermal diffusivity controls the time rate of temperature change as heat passes through a material.
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The movement of heat from a warmer object to a cooler one is called heat transfer. There are three methods of heat transfer: conduction, convection, and radiation. Conduction is the movement of heat energy through a substance or from one substance to another by direct contact of atoms and molecules.
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Conduction is the transfer of thermal energy. It occurs between objects or substances that are touching.
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Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal conductors are materials that are good conductors of thermal energy.
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The most common heat sink materials are aluminium alloys. Aluminium alloy 1050 has one of the higher thermal conductivity values at 229 W/m•K but is mechanically soft. Aluminium alloys 6060 (low stress), 6061, and 6063 are commonly used, with thermal conductivity values of 166 and 201 W/m•K, respectively.
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Heat can also travel along a material as one molecule transfers energy to a neighboring one. This type of heat transfer is called conduction. (See Kinetic Theory of Matter for another explanation of this.) Conduction is mainly seen with solid objects, but it can happen when any materials come into contact.
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Thermal resistance means it is a property of material which resiste the heat flow of heat transfer which may be conduction, convection or Radiation. Thermal conductivity means ability of material which conducts max. ... higher the conductivity, higher heat transfer and lower the conductivity lower will be heat transfer.
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Conductors A material through which heat can move easily is called a conductor. Iron, silver, aluminum, stainless steel, and copper are all examples of metals that are good conductors. 7. Insulators Some cooking pots are made of glass.
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Conduction is the transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more.
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Generally, ionic compounds are better conductors of heat (and electricity) when in molten form or when dissolved in the water. ... In the case of ionic compounds, in the molten state or when dissolved in water, free carriers (electrons) are available for conducting heat.
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['Electrical and thermal conductivity.', 'Malleability and ductility.', 'Melting point.', 'Solubility.']
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Thermal Conductivity and Temperature Molecules will move more quickly at higher temperatures, and therefore heat will be transferred through the material at a higher rate. This means that the thermal conductivity of the same sample has the potential to change drastically as the temperature increases or decreases.
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While all metals can conduct electricity, certain metals are more commonly used due to being highly conductive. ... Another common misconception is the pure Gold is the best conductor of electricity. While Gold does have a relatively high conductive rating, it is actually less conductive than Copper.
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Conduction, convection, and radiation are the three forms of thermal energy transfer. Conduction involves direct contact with molecules, convection involves moving hot particles, and the motion of electromagnetic waves involves radiation.
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Answer and Explanation: Gases have the highest entropy.
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c]low conductivity,hogh melting point. d]low resistivity,high melting point. e]high resistivity,high melting point. The heating element must have high-melting point so that it can withstand for high temperature and even a little raise in temperature will not damage the heating element of the heater.