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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Cancel Reply 0 characters used from the allowed. Adiabatic processes Further information 2. Examples of intensive properties are temperature, mass density mass divided by volumeand pressure.

When a system does work it causes atoms or electrons in its surroundings to termoidnamica in an organized way. An endothermic process in a diathermic container results in energy flowing primeira lei da termodinamica the system as heat.

primeira lei da termodinamica In chemistry, we encounter reactions that can be harnessed to provide heat 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. Parte 1 de 15 The First Law This chapter introduces some of the basic concepts of thermodynamics.

Send this link to let others join your presentation: The basic concepts For the purposes of physical chemistry, the universe is divided into two parts, the system and its surroundings. The joule, which is named after the nineteenth-century scientist J. In molecular terms, heating is the dw of energy that makes use of disorderly molecular motion.

All combustion reactions are exothermic. The basic concepts 2. Many processes in chemistry have an energy of several electronvolts. We observe the falling weight, the orderly descent of its atoms, and report that work is being done even though it is stimulating thermal motion.


When a system heats its surroundings, molecules of the system stimulate the thermal motion of the molecules in the surroundings Fig. The relations we derive also enable us to discuss the liquefaction of gases and to establish the relation between the heat capacities of a substance under different conditions.

The system is the part of the world in which we have a special interest. The fundamental physical property in thermodynamics is work: Joule, is defined as. Houston, we have a problem! 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 weight.

An exothermic process is primeira lei da termodinamica process that releases energy as heat into its surroundings. The distinction between work and heat is made in the surroundings. The ordered motion of the atoms primeira lei da termodinamica a falling weight does work on the system. The energy primeira lei da termodinamica a system is its capacity to do work. Do you really want to delete this prezi?

The current definition of the calorie in terms of joules is. The type of system depends on the characteristics of the boundary that divides it from the surroundings Fig. ca

Primeira lei da termodinâmica

This chapter introduces some of the basic concepts of thermodynamics. An endothermic processis a process in which energy is acquired from its surroundings as heat. The internal primeiea primeira lei da termodinamica a state function in the sense that its value prieira only on the current state of the system and is independent of how that termorinamica has been prepared.


Doing work primeira lei da termodinamica equivalent to raising a weight somewhere in the surroundings. Neither you, nor the coeditors you shared it with will be able to recover it again. When work 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.

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Primeira lei da termodinâmica – A primeira lei da termodinâmica do livro do Atkins

If matter primeira lei da termodinamica pass through the boundary the system is classified as closed. We also begin to unfold some of the power of thermodynamics by showing how to establish relations between different properties of a system. Changing any one of the state variables, such as the pressure, results in a change in internal energy.

Send the link below via email or IM. When a weight is raised or lowered, its atoms move in an organized way up or down. For instance, the atoms shown here may be part of a weight that is being raised.

Both open and closed systems can exchange energy with their surroundings. In other words, it is a function of the properties that determine the current state of the system. Stand out and be remembered with Primeira lei da termodinamica, the secret weapon of great presenters.

The disorderly motion of molecules is called thermal motion. If matter can be transferred through the boundary between the system and its surroundings the system is classified as open.