NationMaster - Encyclopedia: Isochoric process

An isochoric process, also called an isometric process or an isovolumetric process, is a thermodynamic process in which the volume stays constant; $Δ V = 0$ . This implies that the process does no pressure-volume work, since such work is defined by Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Generalized PV diagram A pressure volume diagram (or P-V diagram, or volume-pressure loop)[1]) is used to describe a thermal cycle involving the following two variables: Volume (on the X axis) Pressure (on the Y axis) This is in fact enough information to fully describe a simple system... Thermodynamics (Greek: thermos = heat and dynamic = change) is the physics of energy, heat, work, entropy and the spontaneity of processes. ... In thermodynamics, thermodynamic work is the quantity of energy transferred from one system to another. ...

Δ W = P Δ V

where P is pressure (no minus sign; this is work done by the system).

By applying the first law of thermodynamics, we can deduce that $Δ U$ the change in the system's internal energy, is The first law of thermodynamics, a generalized expression of the law of the conservation of energy, states: // Description Essentially, the First Law of Thermodynamics declares that energy is conserved for a closed system, with heat and work being the forms of energy transfer. ...

Δ U = Q

for an isochoric process: all the heat being transferred to the system is added to the system's internal energy, U. If the quantity of gas stays constant, then this increase in energy is proportional to an increase in temperature,

Q = n C V Δ T

where C_V is molar specific heat for constant volume.

On a P-V diagram, an isochoric process appears as a straight vertical line. Generalized PV diagram A pressure volume diagram (or P-V diagram, or volume-pressure loop)[1]) is used to describe a thermal cycle involving the following two variables: Volume (on the X axis) Pressure (on the Y axis) This is in fact enough information to fully describe a simple system...

Category: Thermodynamics In thermodynamics, an adiabatic process or an isocaloric process is a process in which no heat is transferred to or from the working fluid. ... A cyclic process is a thermodynamic process which begins from and finishes at the same thermostatic state. ... An isobaric process is a thermodynamic process in which the pressure stays constant; . The heat transferred to the system does work but also changes the internal energy of the system: according to the first law of thermodynamics, where W is work done by the system, E is internal energy, and... An isothermal process is a thermodynamic process in which the temperature of the system stays constant: Î”T = 0. ... A polytropic process is a thermodynamic process that a system undergoes that obeys the relation , where p is pressure, V is volume, n is any real number (polytropic exponent), and K is a constant. ...

Results from FactBites:

AKTS advanced thermal safety software - TG DSC DTA TG-MS TG-FTIR EGA TMA (4827 words)
	For self-heating reactions, incorrect kinetic description of the process is usually the main source of serious errors for the determination of the Time to Maximum Rate under adiabatic conditions (TMRad).
	Processing, design, quality control, and operational applications all require an evaluation of thermal hazards and an ability to predict the safety limits and the course of the decomposition process in extended temperature ranges [1-5].
	The prediction of the decomposition of the boost propellant under isochoric conditions at 50°C with ± 40°C amplitude and 24h period indicates that after 3.5 months the sample is fully decomposed.

Cyclic process - Wikipedia, the free encyclopedia (829 words)
	A cyclic process is a thermodynamic process which begins from and finishes at the same thermostatic state.
	Equation (1) makes a cyclic process similar to an isothermal process: even though the internal energy changes during the course of the cyclic process, when the cyclic process finishes the system's energy is the same as the energy it had when the process began.
	The adiabatic processes are impermeable to heat: heat flows into the loop through the left pressurizing process and some of it flows back out through the right depressurizing process, and the heat which remains does the work.

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