EXPLAIN THE DIFFERANCE BETWEEN POEN AND CLOCED THERMODYNAMIC SYSTEM WITH EXAMPLES
Added by Kevin J.
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- Open system: also called a control volume; can exchange both mass and energy (heat and work) with its surroundings. - Closed system: cannot exchange mass with surroundings, but can exchange energy (heat and work) with surroundings. Show more…
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a) Explain the differences between an open system (e.g. a heat exchanger) and a closed system (e.g. a Stirling engine) in terms of their operation and construction. You may use diagrams and show how the formula for the first and second law of thermodynamics would be modified for each system b) Show how the formula for the first law of thermodynamics would be modified for each system. c) Show how the formula for the second law of thermodynamics would be modified for each system.
Aishwarya K.
1. Differentiate between isolated, open, and closed thermodynamic systems.
Madhur L.
Thermodynamic Systems and Spontaneity The definition of the system (often implied) identifies the region or collection of substances for which we wish to know some quantities (either functions of state such as temperature, volume, pressure, internal energy, relative enthalpy, entropy etc or path-dependent quantities such as work done on the system or heat transmitted to or from the system). A system can be identified which is either open, closed or isolated. An open system can exchange both energy (by either heat or work) as well as matter with its surroundings. A closed system can exchange energy but NOT matter with its surroundings. An isolated system can exchange neither energy nor matter with its surroundings. An example of an open system might be a mug of coffee, which, as it cools, exchanges heat and also matter (as water vapour) with its surroundings. An example of a closed system might be the contents of a sealed plastic bag, which can exchange heat (by conduction through its walls) and work (by changing its volume) but no matter with its surroundings. An example of something which approximates an isolated system might be the contents of a rigid, sealed thermos flask, which, if idealized, cannot exchange any energy or matter with its surroundings. True or False? Spontaneous reactions can be slow. The system includes all that we are not focusing on. Thermodynamics describes the direction in which a reaction will proceed. A spontaneous reaction requires that the heat of the universe decrease. An open system allows the transfer of heat to the surroundings.
Adi S.
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