Information about the transfer of heat?
why it happens? it’s for a chem lab. i’m dealing with transfer of heat from water to iron washers. which has higher specific heat- why? why does metal conduct heat more than water… etc. fill me up with anything/everything you know =D
thanksss!!
In general, solids conduct heat better than liquids which conduct heat better than gases. There are several mechanisms by which heat is transmitted. One is by conduction, two bodies in contact with each other, another is convection where a gas acts as the transmitter of heat from one body to another, and thermal radiation, where the heat is transmitted as electromagnetic energy. In terms of efficiency, generally, conduction is the most efficient, then convection, then radiation.
In solids, atoms are bonded together tightly and transfer information (sound, heat, vibration) very well because they’re all hooked together. If one atom warms up, the heat quickly travels to its neighbor and on and on down the line until the entire solid warms up. Liquids are like atoms (or molecules) separated by a small amount of space, they’re not hooked together. As one atom (or molecule) heats up, it bounces into another neighbor after some travel time, and then heats it up, and on and on but with some additional travel time for each meeting. Gases are similar to liquids except the space between the atoms (molecules) is much greater, hence the travel time for information for each exchange is much greater, so in bulk it takes longer for a large mass of gas to heat up. That explains why convection takes longer to heat bodies than conduction. It also tells you why a Thermos bottle works. Between the inside and outside of the container, there are no molecules of gas (it’s a vacuum) to transfer energy from the inside to the outside and you can keep the conduction path very small and well insulated.
Iron on heat transfer paper
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