chapter3workandheat

chapter3workandheat - Chapter 3 Work and Heat Transfer Work...

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1 Chapter 3 Work and Heat Transfer Work Transfer Mechanics: The work is done by a force as it acts upon a body moving in the direction of force. Thermodynamics: Work transfer is considered as occurring between the system and the surroundings. Work is said to be done by a system if the sole effect on things external to the system can be reduced to the rising of a weight. Figure: Work transfer from a system When work is done by a system, it is arbitrarily taken to be positive, and when work is done on a system, it is taken to be negative. System boundary

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2 Path function and point function Thermodynamic properties are point functions, since for a given state there is a definite value for each property 21 dV V V = On the other hand, work done in a quasi-static process between two given states depends on the path followed 2 1 dW W W = 2 1 dW W = Heat is defined as the form of energy that is transferred between two systems (or a
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This note was uploaded on 01/28/2009 for the course ENGR 2640 taught by Professor Gregnaterer during the Spring '09 term at UOIT.

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chapter3workandheat - Chapter 3 Work and Heat Transfer Work...

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