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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Thermodynamics, the primeeira of the transformations of energy, enables us to discuss all these matters quantitatively and to make useful predictions. The relations we derive primeira lei da termodinamica enable us to discuss the liquefaction of gases and to establish the relation between the heat capacities of a substance under different conditions. Do you really want to delete this prezi?
The basic concepts 2. Present to your audience Start remote presentation. The ordered motion primeira lei da termodinamica the atoms in a falling weight does work on termodinamifa system. An example of an endothermic process is the vaporization of water. An endothermic processis a process in which energy is acquired from its surroundings as heat. The current definition of the calorie in terms of joules is.
The fact that a falling weight may stimulate thermal motion in the system is irrelevant to the distinction between heat and work: Both open and closed systems can exchange energy with their surroundings.
Neither you, nor the coeditors you shared it with will be able to recover termodunamica again. Check out this article to learn more or contact your system administrator. We observe primdira falling primeira lei da termodinamica, the orderly descent of its atoms, and report that work is being done even though it is stimulating thermal motion.
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 your presentation Learn more about this feature in our knowledge base article.
Houston, we have a problem! This chapter introduces primeira lei da termodinamica of the basic concepts of thermodynamics. Transfer of energy from the surroundings to the system makes primeira lei da termodinamica of random motion thermal motion in the surroundings.
For instance, the atoms shown here may be part of a weight that is being raised. Constrain to simple back and forward steps. When a system heats its surroundings, primeira lei da termodinamica of the system stimulate the thermal motion of the molecules in the surroundings Fig. 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.
See more popular or the latest prezis. Parte 1 de 15 The First Law This chapter introduces some of the basic concepts of thermodynamics. If matter can be transferred through the boundary between the system and its surroundings the system is classified as open.
Changing any one of the state variables, such as the pressure, results in a change in internal energy. Send this link to let others join your presentation: Send the primeira lei da termodinamica below via email or IM Copy.
Primeira lei da termodinâmica – A primeira lei da termodinâmica do livro do Atkins
A chemical reaction that drives an electric primeira lei da termodinamica through a resistance also does work, because the same current could be driven primwira a motor and used to raise a weight. The atoms in a spring move in an orderly way when it is wound; the. A molecule has a certain number of degrees of freedom, such as the ability to translate the motion of its centre of termodinamiva through spacerotate around its centre of mass, or vibrate as its bond lengths and angles change.
The distinction between work and heat is made in the surroundings. The release of energy can be used to provide heat when a primeira lei da termodinamica burns in a furnace, to produce mechanical work when a fuel burns in an engine, and to termodinamjca electrical work when a chemical reaction pumps electrons through a circuit.
Primeira lei da termodinâmica
For example, a chemical bond might break if a lot of energy becomes concentrated in it. The energy of a system is its capacity to do work. These features are summarized in Fig.
Present to your audience. When termodinamicca is done on an otherwise isolated system for instance, by compressing a gas or winding a springthe capacity of the system to do work is increased; in other words, the energy of the system is increased. It may be a reaction vessel, an engine, an electrochemical cell, a biological cell, and so on.
primeira lei da termodinamica
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 primeira lei da termodinamica is increased. Add a personal note: The system is the part of the world in which we have a primeira lei da termodinamica interest. Differential scanning calorimetry 2. In molecular terms, heating is the transfer of energy that makes use of disorderly molecular motion.
The surroundingscomprise the region outside the system and are where we make our measurements.
A primeira lei da termodinâmica dos processos homogêneos
Reset share links Resets both viewing and editing links coeditors shown below are not affected. Thus, the energy to remove an electron from a sodium atom primeira lei da termodinamica close to 5 eV.
An example of doing work is the expansion of a gas that pushes out a piston and raises a weight. A firewall is blocking access to Prezi content. Calories cal and kilocalories kcal are still encountered.