= &hi2\rA / \r7 - 2 2 +s¹0º*»¼1bc½1 mol*¾1¿:Hbc\r^À)d1?Á % , ÃZÄÅÆÇ1ÈÉ¡F¹:H OÊ*<\rË1 ?̾*ÍÎp»^Cmol@.\rK+s»¼[*Ï¥<\rc q C m o ÐdT ' C moldT\rrji rp 1 2\r= C mmoOll \ In rri + ln rrt @' = C .RlO l In-rj--t r-rt\r11 1 2 1 \1 2\rr^T+s¹0º*»¼1Ñ\rc mol r - ^ @= c mol 7?- r @\rr - Ò + q\rp Ó\r5 - 5 0 = C moll n ^ ^ -\r7 - 2 3 Ô 0à* 0.5kg*ÕÖ]pF×ØÙÚËÛ0\*¾1Ü:\r5¾*¥<QÞB\r78p,T : H ^ 20 ß*àá01âp,*«<Ë@?\rC¾)p,*Ï¥<@Bã]äTåAB?¾*ÊKp4 = 334 Áæ\rK 1@¾*¥<\rA O Q 0.5x334x1 @3\rAS. = M = ------------ = 612\rT 273 J K -'\r 2@p,*¥<\rQ _ -0.5x334xlQ3\rA52 - = -570\rF 293 J\rCÏ¥<\rA5 = AS, + A 5 2 =612-570 = 42 J ,K -'\r«ã]