Lecture 4
... Adiabatic process: dq = 0 and ds =0. A reversible adiabatic process has a constant entropy (i.e. isentropic). Isothermal process: Tds = dq, the integrated solution is ∆s = q/T Isothermal and isobaric change of phase: ∆s = l/T. is the latent heat of transformation. Isochoric process: Since Tds = dq = ...
... Adiabatic process: dq = 0 and ds =0. A reversible adiabatic process has a constant entropy (i.e. isentropic). Isothermal process: Tds = dq, the integrated solution is ∆s = q/T Isothermal and isobaric change of phase: ∆s = l/T. is the latent heat of transformation. Isochoric process: Since Tds = dq = ...
heat processes
... EGM is a design concept based upon minimization of irreversible processes. It is a new philosophy: reversible processes are good, irreversible wrong. As a measure of irreversibility the rate of entropy generation in a system is considered. Entropy increase is caused by heat transfer from high to low ...
... EGM is a design concept based upon minimization of irreversible processes. It is a new philosophy: reversible processes are good, irreversible wrong. As a measure of irreversibility the rate of entropy generation in a system is considered. Entropy increase is caused by heat transfer from high to low ...
Anonymous-IntroductiontoThermodynamics-qsp_chapte+
... might appear at first sight. We have defined the heat capacity in terms of the amount of heat needed to raise the temperature of a substance by one degree, but we have not stated what heat is. The most rigorous approach is to define first of all the internal energy U of the system. We have already i ...
... might appear at first sight. We have defined the heat capacity in terms of the amount of heat needed to raise the temperature of a substance by one degree, but we have not stated what heat is. The most rigorous approach is to define first of all the internal energy U of the system. We have already i ...
Problem Set 2 3.20 MIT Professor Gerbrand Ceder Fall 2003
... where a and b are constants and f(T) is only a function of temperature, obtain a formula for the equation of state: P=? Problem 1.4 A sample of solid polyethylene is compressed adiabatically and reversibly from a pressure of one atmosphere to a pressure of one thousand atmospheres. The initial tempe ...
... where a and b are constants and f(T) is only a function of temperature, obtain a formula for the equation of state: P=? Problem 1.4 A sample of solid polyethylene is compressed adiabatically and reversibly from a pressure of one atmosphere to a pressure of one thousand atmospheres. The initial tempe ...
Document
... • If HEAT IS ADDED to the system (gas) è Q > 0 • If HEAT IS RELEASED by the system (gas) è Q < 0 W is the work • If WORK IS DONE ON the system (gas) è gas compresses è W > 0 • If WORK IS DONE BY the system (gas) è gas expands è W < 0 ...
... • If HEAT IS ADDED to the system (gas) è Q > 0 • If HEAT IS RELEASED by the system (gas) è Q < 0 W is the work • If WORK IS DONE ON the system (gas) è gas compresses è W > 0 • If WORK IS DONE BY the system (gas) è gas expands è W < 0 ...
4.1 Classical Thermodynamics: The First Law
... Other types of energy can be incorporated, for example gravitational potential energy and chemical energy3. All the different types of energy are often denoted simply by E, so the first law in general reads W Q E . Inside the Black Box In this continuum treatment of thermodynamics (or phenomeno ...
... Other types of energy can be incorporated, for example gravitational potential energy and chemical energy3. All the different types of energy are often denoted simply by E, so the first law in general reads W Q E . Inside the Black Box In this continuum treatment of thermodynamics (or phenomeno ...
Chapter 15: Thermal Properties of Matter
... above which material does not separate into two phases. It goes smoothly without a phase transition. ...
... above which material does not separate into two phases. It goes smoothly without a phase transition. ...
Heat transfer
Heat transfer is the exchange of thermal energy between physical systems, depending on the temperature and pressure, by dissipating heat. The fundamental modes of heat transfer are conduction or diffusion, convection and radiation.Heat transfer always occurs from a region of high temperature to another region of lower temperature. Heat transfer changes the internal energy of both systems involved according to the First Law of Thermodynamics. The Second Law of Thermodynamics defines the concept of thermodynamic entropy, by measurable heat transfer.Thermal equilibrium is reached when all involved bodies and the surroundings reach the same temperature. Thermal expansion is the tendency of matter to change in volume in response to a change in temperature.