A cylinder/piston contains 100L of air at 25°C, 110 kPa. The air is compressed in a reversible polytropic process to a final state of 200°C, 800 kPa. Assume the heat transfer is with the ambient at 25°C. Find the work done by the air.

First Law Applied to Flow Processes topics include: Steady and variable flow processes, polytropic process. The first law of thermodynamics, also known as the law of energy conservation, states that energy can't be created or destroyed, but it can be converted from one form to another. In mechanical engineering, this law is applied to flow processes to analyze the energy transfer and transformation within a system.  The first law of thermodynamics for a flow process states that the increase in the internal energy of a system is equal to the amount of energy added to the system by matter... Show more

First Law Applied to Flow Processes topics include: Steady and variable flow processes, polytropic process.

The first law of thermodynamics, also known as the law of energy conservation, states that energy can't be created or destroyed, but it can be converted from one form to another. In mechanical engineering, this law is applied to flow processes to analyze the energy transfer and transformation within a system. 

The first law of thermodynamics for a flow process states that the increase in the internal energy of a system is equal to the amount of energy added to the system by matter flowing in and by heating. It also accounts for the amount lost by matter flowing out and in the form of work done by the system. 

The first law of thermodynamics for steady flow:
Accounts for all energy entering and leaving a control volume
Is an energy balance for a specified mass of fluid
Is an expression of the conservation of linear momentum
Is primarily concerned with heat transfer 

The first law of thermodynamics can also be applied to pure flow processes of incompressible fluids such as liquids. 

Related Test: Thermodynamics Practice Test: First Law of Thermodynamics

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