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Senior High
Chemistry
高一上化學
Chemistry
Senior High
over 3 yearsago
吳小明
高一上化學
化学小专 40° 18 已知 MgO(s) + H2O(1)→Mg(OH):(s)之 △H = -3.8 千卡。今以 80 克之氧化 鎂加入 25°C、1升之水中。假設盛水之容器是絕熱裝置,其餘熱量散失忽 略不計。並設為1莫耳 Mg(OH)2(s)升高 1°C 所需之熱量恰與升高 18 克水 溫度 1°C 所需之熱量相同。求反應後之水溫約為多少?(已知水的比熱為 (A)7 (B)18 (C)43 (D)80 1卡/克-℃,Mg = 24,O = 16,H = 1.0) (E)85(6分) H = MXS XAT = 1000X1 88:00x2=17600 17600 1000x7
高一上化學
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