Many metals, like silver, copper, gold and aluminum, are good thermal conductors. Thermal conductors are materials that heat passes through easily. Conduction, or the transfer of heat, can take place within a single material or between two objects.Continue Reading
Heat can only travel from a hot material to a cold material. It does not travel in the opposite direction. Materials that do not pass heat easily are known as thermal insulators. Insulators include plastic, wood, rubber and glass. Often, objects that are used to transfer heat are made of metal but have an insulator as a handle. A saucepan is an example of an object that is both a conductor and an insulator. The metal part of the pan is a conductor that allows heat to quickly pass from the stove to the food inside the pan. The metal part of the pan, however, it is too hot to touch without receiving burns. That is why most handles are made of insulators, such as plastic or wood.
Potholders and oven gloves also function as insulators. Some materials, like glass, operate as insulators at room temperature but as conductors when heated to high temperatures. Gases like air also become more conductive when heated to higher temperatures. Metals, when heated, do not conduct heat as well as they do when cooled. Many conductive materials operate better at very low temperatures.Learn more about Thermodynamics
Of the elemental metals, silver is the best conductor of heat. It has a thermal conductivity of 235, meaning that it is able to transmit that amount of heat energy a single foot per hour per degree Fahrenheit.Full Answer >
Common heat-absorbing materials include precious metals such as silver, copper and gold. Materials that conduct more heat are capable of absorbing heat before transferring it. The most conductive naturally occurring material is diamond, followed by other pure metals. The most conductive material known is helium II, a superfluid isotope of helium that has over 45 times the absorption of natural diamonds.Full Answer >
The specific heat capacity of aluminum is 0.215 calories per gram per degrees Celsius or 0.215 calories per gram per degrees Kelvin. This value is measured at room temperature and standard atmospheric pressure.Full Answer >
Good insulators are materials that do not allow heat to pass through them. They are also materials that either slow down or do not allow transfer of electricity through them.Full Answer >