Definition for word: Heat (types Of Heat)

Specific heat is the number of BTUs a material absorbs or releases for each degree (F) of temperature change. Water has a specific heat of 1; aluminum is 0.2.           Sensible heat is heat that you can feel. Latent heat is the heat absorbed or released by a substance undergoing a phase change, such as ice changing to water or water to steam.

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In physics and thermodynamics, heat is the process of energy transfer from one body or system to another due to thermal contact, which in turn is defined as an energy transfer to a body in any other way than due to work performed on the body.

A related term is thermal energy, loosely defined as the energy of a body that increases with its temperature. Heat is also loosely referred to as thermal energy, although many definitions require this thermal energy to actually be in the process of movement between one body and another to be technically called heat (otherwise, many sources prefer to continue to refer to the static quantity as "thermal energy"). Heat is a means of energy transfer, rather than a form of energy. Energy is transferred, not heat.[citation needed]

Energy transfer by heat can occur between objects by radiation, conduction and convection. Temperature is used as a measure of the internal energy or enthalpy, that is the level of elementary motion giving rise to heat transfer. Energy can only be transferred by heat between objects - or areas within an object - with different temperatures (as given by the zeroth law of thermodynamics). This transfer happens spontaneously only in the direction of the colder body (as per the second law of thermodynamics). The transfer of energy by heat from one object to another object with an equal or higher temperature can happen only with the aid of a heat pump via mechanical work.

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