열역학

1.1 Thermodynamic System(열역학적계) *Free body (diagram) in mechnics = ∑ =0 (Newton`s 2nd law of motion) *System in Thermodynamics 1)Closed System(밀폐계) - fixed mass - no mass transfer - energy transfer - control mass (검사질량, 고정질량) thermodynamic universe = sys + surr (열역학적 우주) (계) (계에 영향을 미칠수 있는 범위) 2)Isolated System(고립계) - Special case of the closed System - no mass transfer - no energy transfer - does not interact with surroundings 3)Open System - energy and mass transfer - fixed volume - control volume(검사체적, 고정체적) - flow system(유동계) -choice of C.V depend on convinience of analtsis 1.2 property, state, process, and equilibruim (물성치, 상태, 과정, 그리고 평형) *Properties - macroscpic characteristics of system (물성치) mass, volumme, energy, pressure, temp (P, V, T, E, m) - assigned @ given time - Thermodyamics deals with quantities(상태) rather than properties - independent of p…
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