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2H2\uff08g\uff09+ O2(g)=2H2O(l) \u25b3H=\uff0d571.6KJ\/mol<\/font><\/p>\n

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<\/p>\n

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    \u4e8e\u662f\u6211\u60f3\u5230\u4e86\uff1a<\/p>\n

\u8111\u529b+\u4f53\u529b+\u65f6\u95f4=\u6210\u5c31+\u526f\u4ea7\u7269 \u25b3H=\uff1f<\/font><\/p>\n

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    \u5f88\u591a\u4eba\u8ba4\u4e3a\uff0c\u8d5a\u94b1\u5f88\u91cd\u8981\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4eba\u751f\u8fdb\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4fdd\u6301\u5f88\u5c0f\u7684\u25b3<\/font>H\u5f88\u91cd\u8981\u3002\u5176\u5b9e\u5728\u5316\u5b66\u91cc\u9762\u6709\u4e2a\u81ea\u7531\u80fd\u7684\u6982\u5ff5\u3002<\/p>\n

\u25b3G=\u25b3H-T\u00b7\u25b3S<\/font><\/p>\n

    S\u662f\u201c\u71b5\u201d\u7684\u610f\u601d\u3002\u25b3<\/font>G\u53ef\u4ee5\u7528\u6765\u63cf\u8ff0\u4e00\u4e2a\u53cd\u5e94\u8fdb\u884c\u7684\u5bb9\u6613\u7a0b\u5ea6\u3002\u6709\u7684\u4eba\u8d5a\u7684\u94b1\u867d\u7136\u5f88\u591a\uff0c\u25b3<\/font>H\u867d\u7136\u5f88\u5c0f\uff0c\u4f46\u662f\u65b9\u6cd5\u4e0d\u5bf9\uff0c\u25b3<\/font>S\u4e5f\u4e3a\u8d1f\u503c\uff0c\u5de5\u4f5c\u7684\u5f88\u52b3\u7d2f\uff0c\u25b3G\u5c31\u4f1a\u76f8\u5bf9\u8f83\u5927\uff0c\u4eba\u6d3b\u5f97\u5c31\u4f1a\u5f88\u7d2f\u3002<\/p>\n

    \u7eb5\u89c2\u6574\u4e2a\u65b9\u7a0b\u5f0f\uff0c\u25b3<\/font>H\u53ef\u4ee5\u88ab\u5408\u5e76\u5728\u526f\u4ea7\u7269\u4e2d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u85aa\u6c34\u53ea\u662f\u4f5c\u4e3a\u4e00\u79cd\u526f\u4ea7\u7269\u800c\u5b58\u5728\u7740\u3002\u6211\u4eec\u4e0d\u5e94\u8be5\u4e3a\u4e86\u8ffd\u6c42\u8fd9\u4e9b\u526f\u4ea7\u7269\u800c\u505a\u8fc7\u591a\u7684\u52aa\u529b\uff0c\u76f8\u53cd\uff0c\u5728\u8ffd\u6c42\u6210\u5c31\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5927\u91cf\u7684\u4f5c\u4e3a\u526f\u4ea7\u7269\u800c\u5b58\u5728\u7684\u94b1\u4f1a\u5728\u4e0d\u7ecf\u610f\u95f4\u5230\u6765\u3002<\/p>\n

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