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):||9 August 2009|
|PDF File Size:||2.9 Mb|
|ePub File Size:||3.63 Mb|
|Price:||Free* [*Free Regsitration Required]|
When work is done on an otherwise isolated system for instance, by compressing a gas or winding a springprimeira lei da termodinamica capacity of the system to do primeirw is increased; in other words, the energy of the system is increased. Houston, we have a problem! The joule, which is named after the nineteenth-century scientist J.
Parte 1 de 15 The First Law This chapter introduces primeira lei da termodinamica of the basic concepts of thermodynamics. Experiments have shown that the energy of a system may be changed by termodinamjca other than work itself. If matter cannot pass through the boundary the system is classified as closed. If matter can be transferred through the boundary between the system and its surroundings the system is classified as open. The basic concepts 2.
An endothermic processis a process in which energy is acquired from its surroundings as heat. The system is the part of the world in which we have a special interest. Neither you, nor the coeditors primeira lei da termodinamica shared it with will be able to recover it again.
On the first law of termodynamics
The internal energy is the total kinetic and potential energy of the molecules primeira lei da termodinamica the system see Comment 1. Joule, is defined as. A chemical reaction that drives ptimeira electric current through a resistance also does work, because the same current could be driven through a motor and used to raise a weight.
Present to your audience. 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 primeira lei da termodinamica prepared. Present to your audience Start remote presentation.
Primeira lei da termodinâmica
Reset share links Resets both viewing and editing links coeditors shown below are not affected. The ordered motion of the atoms in a falling weight does work on the system.
Primeira lei da termodinamica fact that a falling weight may stimulate thermal motion in the system is irrelevant to the distinction between heat and work: The fundamental physical termodinxmica in thermodynamics primeira lei da termodinamica work: In molecular terms, heating is the transfer of energy that makes use of disorderly molecular motion.
Transfer of energy from the surroundings to the system makes use of random motion thermal motion in the surroundings. Doing work is equivalent to raising a weight somewhere in the surroundings. An isolated system is a closed system that has neither mechanical nor thermal contact with its surroundings. We observe the falling weight, the orderly descent of its atoms, li report that work is being done even though it is stimulating thermal motion. Cancel Reply 0 characters used from the allowed.
A firewall is blocking primeira lei da termodinamica to Prezi content. Much primeira lei da termodinamica this chapter examines the means by which a system can exchange energy with its surroundings in terms of the work it may do or the heat that it may produce. In contrast, work is the transfer of energy that makes use of organized motion Fig.
An extensive property is a property that depends on the amount of substance in the sample. Invited audience members will follow you as you navigate and present People invited to a presentation do not need a Prezi account This link expires 10 minutes after you close the presentation A maximum of 30 users can follow termodinakica presentation Learn more about this termodinamicq in our knowledge base article.
Examples of intensive termodinamixa are temperature, mass density mass divided by volumeand pressure.
The internal energy is an extensive property. An endothermic process in a diathermic container results in energy flowing into the system as heat. An example of doing work is the expansion of a gas that pushes out a piston and raises a weight.
Send link to edit together this prezi using Prezi Meeting learn more: Thus, the energy to remove an electron from a sodium atom is primeira lei da termodinamica to 5 eV. In chemistry, we encounter reactions that can be harnessed to provide dx and work, reactions that liberate energy primeira lei da termodinamica is squandered often to the detriment of the environment but which give products we require, and reactions that constitute the processes of life.
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.
Primeira lei da termodinâmica – A primeira lei da termodinâmica do livro do Atkins
primeira lei da termodinamica Likewise, when work is done on a system, molecules in the surroundings are used to transfer energy to it in an organized way, as the atoms in a weight are lowered or a current of electrons is passed.
Add a personal note: When a system does work it causes atoms or primeira lei da termodinamica in its surroundings to move in an organized way. Food and energy reserves 2. An exothermic process is a process that releases energy as heat into its surroundings. The distinction between work and heat is made in the surroundings. Calories cal and kilocalories kcal are still encountered. The disorderly motion of molecules is called thermal motion.