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1 Work and Heat 功與熱
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2 功 dW = F × dL W = F × LdW = F × dL W = F × L 對於汽缸與活塞組合之裝置 對於汽缸與活塞組合之裝置 P = F / A ; F = PAP = F / A ; F = PA dW = PA × dL = P × dV if P f(V), then W = P × VdW = PA × dL = P × dV if P f(V), then W = P × V
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3 熱 Joule’s ExperimentsJoule’s Experiments James P. Joule (1818 – 1889)James P. Joule (1818 – 1889)
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4 熱力學第一定律 for non-nuclear reaction process E = 0 ; E system + E surr. = 0for non-nuclear reaction process E = 0 ; E system + E surr. = 0 (U +KE+PE) = W + Q (U +KE+PE) = W + Q U = W + Q U = W + Q
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5 功與熱的角色 for non-nuclear reaction process E = 0 ; E system + E surr. = 0for non-nuclear reaction process E = 0 ; E system + E surr. = 0 E system = (U +KE+PE) E system = (U +KE+PE) E surr. 由 W 與 Q 替代其角色 E surr. 由 W 與 Q 替代其角色
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6 熱力學第一定律 (U +KE+PE) = W + Q (U +KE+PE) = W + Q 對於大部分之密閉系統的科學觀察 U = W + Q 對於大部分之密閉系統的科學觀察 U = W + Q
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7 功 流動程序的功之種類 流動程序的功之種類 軸功 軸功 流體流動功 流體流動功 壓容功 壓容功
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