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.
|Published (Last):||2 January 2014|
|PDF File Size:||7.6 Mb|
|ePub File Size:||6.79 Mb|
|Price:||Free* [*Free Regsitration Required]|
Creating downloadable prezi, be patient. Doing work is equivalent to raising a weight somewhere in the surroundings. Terrmodinamica isolated system is a closed system that has neither mechanical nor thermal contact with its surroundings.
Check out this article to learn more or prjmeira your system administrator. The basic concepts 2. Many processes in chemistry have an energy of several electronvolts. Please primeira lei da termodinamica in to add your comment. When an endothermic process takes place in an adiabatic container, it results in a lowering of temperature of primelra system; an exothermic process results in a termodinqmica of temperature.
The ordered motion of the atoms primeira lei da termodinamica a falling weight does work on the system. The type of system depends on the characteristics of the boundary that divides it from the surroundings Fig.
In chemistry, we encounter reactions that can be harnessed to provide heat and work, reactions that liberate energy which is squandered often to the detriment of the environment but which give products we require, and reactions that constitute the processes of life.
(10) Física e Química A – Primeira Lei da Termodinâmica by Nathaly Rodrigues on Prezi
Much of this chapter examines the means primeira lei da termodinamica which a system can exchange energy with its surroundings in terms of the work it may do pri,eira the heat that it may produce.
The disorderly motion of molecules is called thermal motion.
Copy code to clipboard. An exothermic process in a similar diathermic container results in a release of energy as heat into the surroundings.
A molecule has a certain number of degrees of freedom, such as the ability to translate the motion of its centre of mass through spacerotate around its centre of mass, or vibrate as its bond lengths and angles change. Likewise, when work is done on a system, molecules in the surroundings are used primeira lei da termodinamica transfer energy to it in an organized way, as the atoms in a weight are lowered or a current of electrons is passed.
Transfer primeira lei da termodinamica energy from the surroundings to the system makes use of random motion thermal motion in the surroundings.
In contrast, work is the transfer of energy that makes use of organized motion Fig. Termodinajica the system does work when the piston moves out or the spring unwindsthe energy of the system is reduced and it can do less work than before.
The fundamental physical property in thermodynamics is work: Joule, is defined as A primeira lei da termodinamica is primeira lei da termodinamica a small unit of energy: Send the link below via email or IM.
The internal energy is the total kinetic and potential energy of the molecules in the system see Comment 1.
The surroundingscomprise the region outside the system and are primeira lei da termodinamica we make our measurements. Present to your audience. Experiments have shown that the energy of a system may be changed by means other than work itself.
Joule, is defined as.
Primeira lei da termodinâmica
The joule, which is named after the nineteenth-century scientist J. For instance, the atoms shown here may be part of a weight that primeira lei da termodinamica being raised. An extensive property is a property that depends on the amount of substance in the sample.
The thermal motion of the molecules in the hot surroundings stimulates the molecules in the cooler system to move more vigorously and, as a result, the energy of the system is increased. The fact that a falling weight may stimulate thermal motion in the system is irrelevant to the distinction primeira lei da termodinamica heat and work: Send this link to primeira lei da termodinamica others join your presentation: The energy of a system is its capacity to do work.
The internal energy is termodinzmica 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.