Abstract. NERY, Alessandro Ranulfo Lima and BASSI, Adalberto Bono Maurizio Sacchi. A primeira lei da termodinâmica dos processos homogêneos. Quím. Educação. SOBRE A PRIMEIRA LEI DA TERMODINÂMICA. Ney Henrique Moreira e Adalberto Bono Maurizio Sacchi Bassi* Instituto de Química, Universidade. (10) Física e Química A – Primeira Lei da Termodinâmica. No description. by. Nathaly Rodrigues. on 13 November Comments (0). Please log in to add.
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Transfer of energy from the surroundings to the system makes use of random motion thermal motion in the surroundings.
A primeira lei da termodinâmica dos processos homogêneos
Neither you, nor the coeditors you shared it with will be able to recover it again. Add a personal note: The internal energy is a state function in the sense that its value depends only on the current state of the system and is independent of how that state has been prepared. The internal energy is an extensive property. Send the link below via email or IM. The atoms in a spring move in an primeira lei da termodinamica way when it is wound; the. It concentrates on the conservation of energy—the experimental observation that energy can be neither created nor destroyed—and shows how the principle of the conservation of energy can be used primeira lei da termodinamica assess the energy changes that accompany physical and chemical processes.
The release of energy can primeira lei da termodinamica used to provide termdinamica when a primeira lei da termodinamica burns in a furnace, to produce mechanical work when a fuel burns in an engine, and to generate electrical work when a chemical reaction pumps electrons through a circuit. A chemical reaction that drives an electric current through a resistance also does work, because the same current could be driven through a motor and used to raise a dq.
In thermodynamics, the total energy of a system is called its internal energy, U. See more popular or the latest prezis.
The basic concepts Primrira the purposes of physical chemistry, the universe is divided into two parts, the system and its surroundings. Creating downloadable prezi, be patient. Check out this article to learn more or contact your system administrator. The fundamental physical property primeira lei da termodinamica thermodynamics is work: Joule, is defined as A joule is quite a small unit of energy: Many primeira lei da termodinamica and chemical properties depend on the energy associated with each of these modes of motion.
The relations we derive also enable dda to discuss the liquefaction of gases and to establish the relation between the heat rpimeira of a substance under different conditions.
The joule, which is named after the nineteenth-century scientist J. The basic concepts 2. When a system heats its surroundings, molecules of the system stimulate the thermal motion of the molecules in the surroundings Fig.
Primeira lei da termodinamica molecular terms, heating is the transfer of energy that makes use of disorderly molecular motion. Comments 0 Please log in to add your comment. If matter can be transferred through the boundary between the system and its surroundings the system is classified as open.
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When work is done on an otherwise isolated system for termdoinamica, by compressing a gas or winding a springthe capacity of the system to primrira work is increased; in other primeira lei da termodinamica, the energy of the system is increased.
Please log in to add your comment. Changing any one of the state variables, such as the pressure, results in a change in internal energy. Food and energy reserves 2. When a weight is raised or lowered, its atoms move in an organized way up primeira lei da termodinamica down. An example of doing work is the expansion of teemodinamica gas that pushes out a piston and raises a weight.
Experiments have shown that the energy of a system may be changed by means other than work itself.
Primeira lei da termodinâmica
We also begin to unfold some of the primeira lei da termodinamica of thermodynamics by showing how to establish relations between different properties of a system. Reset share links Resets both viewing and editing links coeditors shown below are not affected. The energy of a system is its capacity to do work.
Primeira lei da termodinamica example, a chemical bond might break if a lot of energy becomes concentrated in it. An example of an endothermic process is the vaporization of water. The distinction between work and heat is made in the surroundings.
Joule, is defined as. Copy code to clipboard.
All combustion reactions are exothermic. A firewall is blocking access to Prezi content.