In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not contain heat. Nevertheless, the term is also often used to refer to the thermal energy contained in a system as a component of its internal energy and that is reflected in the temperature of the system.
Heat is energy that flows between objects or systems when there's a temperature difference between them, crossing from the warmer side to the cooler side. Understanding heat matters because it explains how energy moves in the physical world and is fundamental to how machines, weather systems, and countless natural processes work.
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In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not contain heat. Nevertheless, the term is also often used to refer to the thermal energy contained in a system as a component of its internal energy and that is reflected in the temperature of the system.
Calorimetry is measurement of heat by its effect on the states of interacting bodies, for example, by the amount of ice melted or by change in temperature of a body.
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