Lecture

Thermodynamics: State, Quantities, and Differential

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Description

This lecture covers the concepts of state, extensive and intensive quantities, and differentials in thermodynamics. It explains the variables and functions of state, as well as extensive and intensive properties. The lecture also delves into the mathematical analysis of derivatives and temporal derivatives of functions. Examples of extensive and intensive quantities are provided, along with the concept of reduced extensive quantities. Additionally, the lecture discusses processes, including mechanical and thermal changes of state, and the differential of a function, including limits. The derivative with respect to time of a function is also explored.

In MOOC

Thermodynamics II

The aim of the course is to enable students to understand and apply the fundamental concepts of thermodynamics. After presenting the first and second principles of thermodynamics, the lecture will address questions of irreversibility and thermodynamic potentials. After establishing these conceptual foundations, which are the subject of the first part, their engineering applications, such as heat transfer, calorimetry and phase transitions, will be covered. Next, we'll look at the conversion of chemical en

Official source

Ontological neighbourhood

Physics

Thermodynamics: Statistical mechanics

Related concepts (32)

Thermodynamics

Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed by the four laws of thermodynamics which convey a quantitative description using measurable macroscopic physical quantities, but may be explained in terms of microscopic constituents by statistical mechanics.

Laws of thermodynamics

The laws of thermodynamics are a set of scientific laws which define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium. The laws also use various parameters for thermodynamic processes, such as thermodynamic work and heat, and establish relationships between them. They state empirical facts that form a basis of precluding the possibility of certain phenomena, such as perpetual motion.

Second law of thermodynamics

The second law of thermodynamics is a physical law based on universal experience concerning heat and energy interconversions. One simple statement of the law is that heat always moves from hotter objects to colder objects (or "downhill"), unless energy in some form is supplied to reverse the direction of heat flow. Another definition is: "Not all heat energy can be converted into work in a cyclic process." The second law of thermodynamics in other versions establishes the concept of entropy as a physical property of a thermodynamic system.

Chemical thermodynamics

Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of mathematical methods to the study of chemical questions and the spontaneity of processes. The structure of chemical thermodynamics is based on the first two laws of thermodynamics.

First law of thermodynamics

The first law of thermodynamics is a formulation of the law of conservation of energy, adapted for thermodynamic processes. A simple formulation is: "The total energy in a system remains constant, although it may be converted from one form to another." Another common phrasing is that "energy can neither be created nor destroyed". While there are many subtleties and implications that may be more precisely captured in more complex formulations, this is the essential principle of the First Law.

Related lectures (64)

Thermodynamics: System, Surface Actions, and Typology MOOC: Thermodynamics II

Covers thermodynamic systems, surface actions, and system typology with examples.

Thermodynamics: Introduction to Continuous Media MOOC: Thermodynamics I

Covers the fundamental assumptions and state characterization of continuous media.

Thermodynamics: Exploring Thermodynamic Potentials and Equilibrium States

Covers thermodynamic potentials and their role in system equilibrium with reservoirs.

Thermodynamics: Thermal Machines and Carnot Cycle

Discusses thermal machines, focusing on the Carnot cycle and its efficiency in thermodynamics.

Thermodynamic Variables