Units S.J.T.U. Phase Transformation and Applications ·Temperature 1 Kelvin -F=32+1.8C ·Composition -18K:18/24 -Measurement SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 1 First law I
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 1 First law I Units • Temperature – 1 Kelvin – F=32+1.8C • Composition – 18K: 18/24 – Measurement
Math S.J.T.U. Phase Transformation and Applications ·Total differential -1 Euler 三一 0z Stiring approximately equation lnW!≈WlnW-W SJTU Thermodynamics of Materials Spring 2006 ©X.J.Jin Lecture 1 First law I
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 1 First law I Math • Total differential ≈ ln!ln − NNNN • Stiring approximately equation ⎟ −= 1 ⎠⎞ ⎜⎝⎛ ∂∂ ⎟⎠⎞ ⎜⎝⎛ ∂∂ ⎟⎟⎠⎞ ⎜⎜⎝⎛ ∂∂ z xy zy xz yx x y z y z x z x y ⎟⎟⎠⎞ ⎜⎜⎝⎛ ∂∂ ⎟⎠⎞ ⎜⎝⎛ ∂∂ ⎟ −= ⎠⎞ ⎜⎝⎛ ∂∂ Euler
Index of nomenclature S.J.T.U. Phase Transformation and Applications System/surroundings.系统、环境 Open/close/isolated systems敞开、封闭、孤立 Thermal equilibrium/steady state平衡、稳态 ·Heat/work热、功 o Internal energy内能热力学能 o State function状态函数 o Intensive/extensive properties:强度、容量性质 o Enthalpy焓 ·Heat capacity热容 SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 1 First law I
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 1 First law I Index of nomenclature • System / surroundings系统、环境 • Open / close / isolated systems敞开、封闭、孤立 • Thermal equilibrium / steady state平衡、稳态 • Heat / work热、功 • Internal energy内能热力学能 • State function状态函数 • Intensive / extensive properties强度、容量性质 • Enthalpy焓 • Heat capacity热容
0th law S.J.T.U. Phase Transformation and Applications Two systems in thermal equilibrium with a third system are also in thermal equilibrium with each other. Principle of measuring Temperature! Thermometer->the third system SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 1 First law I
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 1 First law I 0th law • Two systems in thermal equilibrium with a third system are also in thermal equilibrium with each other. Principle of measuring Temperature! Thermometer -> the third system
1.1 Systems and Surroundings S.J.T.U. Phase Transformation and Applications A system:any portion of space or matter set aside for study How the system is defined Open system:matter is allowed to enter or leave Close system:no matter enters or leaves A bottle of water? .Surroundings:everything else SJTU Thermodynamics of Materials Spring 2006 ©X.J.Jin Lecture 1 First law I
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 1 First law I 1.1 Systems and Surroundings •Surroundings: everything else • A system: any portion of space or matter set aside for study < How the system is defined – Open system: matter is allowed to enter or leave – Close system: no matter enters or leaves A bottle of water?