Heat Transfer by Convection This mode of heat transfer is seen in liquids and gases in which the molecules are less densely packed and are free to move. Thus, convection is the primary mode of heat transfer in fluids.Let us see the following example and learn how heat is transferred by convection. The bottom of a vessel containing water is heated. After sometime, the … [Read more...] about Heat Transfer by Convection
Heat
What is Heat
HEAT - A FORM OF ENERGY Have you stirred hot tea or milk with a stainless steel spoon? Next time you do this, leave the spoon in the hot liquid for a little while. Now, touch the handle of the spoon. What do you notice? The handle of the spoon would have got a little warm. Why did the handle of the spoon become warm? When there is a difference in temperature between … [Read more...] about What is Heat
Heat Transfer by Conduction
Heat Transfer by Conduction We have seen in earlier examples that metal objects heat up when they come in contact with hot solids or liquids. For example, a stainless steel spoon becomes hot when left in a hot liquid. How do you think this happens? The heat from the hot liquid moves to the container and from there to the stainless steel spoon.How Does Conduction … [Read more...] about Heat Transfer by Conduction
Understanding Specific Latent Heat
Understanding Specific Latent HeatSpecific Latent HeatThe amount of heat required to change the phase of a substance depends on the mass and the type of material of the substance. A small ice cube melts quickly but a large block of ice melts very slowly. 100 J of heat energy can melt a large amount of wax, but the same amount of heat can only melt a small amount … [Read more...] about Understanding Specific Latent Heat
What is meant by Latent Heat
What is meant by Latent Heat Latent HeatFigure shows some ice cubes in a persons hand. The person makes the following observations and inferences, as shown in Table.Observation InferenceThe ice is colder than the surroundings. Heat energy is continuously being absorbed by the ice from the surroundings.The ice is at a constant temperature The heat … [Read more...] about What is meant by Latent Heat