Some common liquid-in-glass thermometers include: Thermocouple Thermometers A thermocouple thermometer consists of two wires made of different metals where the ends of the two wires are joined together to form two junctions. If the two junctions are at different...
Heat is the thermal energy that is supplied from the hotter object to the cooler object. The unit of measurement for energy is the joule. Energy is supplied to water when heated. It is transformed into the internal energy of the water molecules which is in two forms:...
Melting Melting is the process by which a solid changes into a liquid. The melting point is the temperature at which melting occurs; at a definite or constant temperature. A pure substance only melts at its melting point. The presence of impurities lowers the melting...
Boiling is the change of state from a liquid into a vapour, occurring at a constant temperature called the boiling point. The boiling point of a substance is the temperature of a substance at which it boils. During the process of boiling, the heat supplied to the...
Latent heat of fusion , Lf of a solid is the heat required to change it from solid to liquid state or vice versa without any change in temperature. The unit for Lf is the joule(J). The latent heat of an object depends on its mass. The specific latent heat of fusion,...
Thermal expansion is the expansion of a material when its temperature rises. Generally, solids expand the least, followed by liquids and then gases. Uses of expansion Rivets are used to join materials . A red-hot rivet is passed through holes in two metal plates and...
Temperature is the measure of the degree of ‘hotness’ or coldness’ of a body. The temperature of a body is a measure of the average kinetic energy of its’ particles. Because it is the average kinetic energy of a particle, it does not depend on the size of the object....