下列两组热化学方程式中，有关△H的比较正确的是（ ）①CH4（g）+2O2（g）═CO2（g）+2H2O（g）；△H1 下列热化学方程式中△H代表燃烧热的是（ ）A．CH4（g）...
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A\uff0e\u7b26\u5408\u71c3\u70e7\u70ed\u7684\u5b9a\u4e49\uff0c\u70ed\u5316\u5b66\u65b9\u7a0b\u5f0f\u4e2d\u25b3H\u4ee3\u8868\u71c3\u70e7\u70ed\uff0c\u6545A\u6b63\u786e\uff1bB\uff0e\u786b\u5355\u8d28\u71c3\u70e7\u751f\u6210\u4e8c\u6c27\u5316\u786b\uff0c\u6545B\u9519\u8bef\uff1bC\uff0e\u751f\u6210\u4ea7\u7269\u4e2d\u6c14\u6001\u6c34\u662f\u4e0d\u7a33\u5b9a\u7684\u6c27\u5316\u7269\uff0c\u4e0d\u7b26\u5408\u71c3\u70e7\u70ed\u7684\u6982\u5ff5\uff0c\u6545C\u9519\u8bef\uff1bD\uff0e\u70ed\u5316\u5b66\u65b9\u7a0b\u5f0f\u8868\u793a\u7684\u662f2mol\u53ef\u71c3\u7269\u71c3\u70e7\u653e\u51fa\u7684\u70ed\u91cf\uff0c\u4e0d\u7b26\u5408\u71c3\u70e7\u70ed\u7684\u6982\u5ff5\uff0c\u6545D\u9519\u8bef\uff1b\u6545\u9009A\uff0e
①CH4（g）+2O2（g）═CO2（g）+2H2O（g）；△H1、CH4（g）+2O2（g）═CO2（g）+2H2O（l）；△H2 ，两个反应都是放热反应，后者生成液态水，所以放出的热量大于前者，而放热反应△H小于0，放热越多，焓变值越小，故△H1＞△H2；②NaOH（aq）+
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故选：B．
绛旓細鈶燙H4锛坓锛+2O2锛坓锛夆晲CO2锛坓锛+2H2O锛坓锛夛紱鈻矵1銆丆H4锛坓锛+2O2锛坓锛夆晲CO2锛坓锛+2H2O锛坙锛锛涒柍H2 锛屼袱涓弽搴旈兘鏄斁鐑弽搴旓紝鍚庤呯敓鎴愭恫鎬佹按锛屾墍浠ユ斁鍑虹殑鐑噺澶т簬鍓嶈咃紝鑰屾斁鐑弽搴斺柍H灏忎簬0锛屾斁鐑秺澶氾紝鐒撳彉鍊艰秺灏忥紝鏁呪柍H1锛炩柍H2锛涒憽NaOH锛坅q锛+12H2SO4锛堟祿锛夆晲12Na2SO4锛坅q锛+H2O锛...
绛旓細CaO(s)+H2O(l)=Ca(OH)2(s)鏄竴涓斁鐑鍙嶅簲鈻H6 <0 鎵浠モ柍H5>鈻矵6 绛旀閫堿
绛旓細鐢辩洊鏂畾寰嬧憼-鈶★細4Al锛坰锛+2Fe2O3锛坰锛=2Al2O3锛坰锛+4Fe锛坰锛夆柍H1-鈻矵2锛岄摑鐑弽搴旀斁鐑紝鎵浠モ柍H1-鈻矵2锛0锛屽嵆鈻矵1锛溾柍H2锛庢晠绛旀涓猴細锛滐紱锛4锛夐斿緞鈪★細C锛坰锛+H2O锛坓锛夆晲CO锛坓锛+H2锛坓锛夆柍H2锛0 鈶 鍐嶇噧鐑ф按鐓ゆ皵锛2CO锛坓锛+O2锛坓锛夆晲2CO2锛坓锛夆柍H3锛0 鈶 2H2锛坓锛+...
绛旓細A锛嶴涓嶆槸姘у寲鐗╋紝涓嶇鍚堢噧鐑х儹鐨勬蹇佃姹傦紝鏁匒閿欒锛汢锛庣敓鎴愮ǔ瀹氱殑姘у寲鐗╋紝姘村簲涓烘恫鎬侊紝鏁匓閿欒锛汣.1molCO瀹屽叏鐕冪儳鐢熸垚绋冲畾鐨凜O2锛岀鍚堢噧鐑х儹鐨勬蹇佃姹傦紝鏀惧嚭鐨勭儹閲忎负鐕冪儳鐑紝鏁匔姝ｇ‘锛汥锛庣噧鐑х儹鏄寚1mol绾噣鐗╁畬鍏ㄧ噧鐑锛屾柟绋嬪紡涓H2涓2mol锛屼笉鏄噧鐑鐑紝鏁匘閿欒锛庢晠閫塁锛
绛旓細A銆丼鐨鍖栧璁￠噺鏁颁负1锛屼骇鐗╀负绋冲畾姘у寲鐗╋紝鈻矵浠ｈ〃鐕冪儳鐑紝鏁匒姝ｇ‘锛汢銆丆鐨勫寲瀛﹁閲忔暟涓1锛屼絾浜х墿涓嶆槸绋冲畾姘у寲鐗╋紝纰崇殑绋冲畾姘у寲鐗╀负浜屾哀鍖栫⒊锛屾墍浠モ柍H涓嶄唬琛ㄧ噧鐑х儹锛屾晠B閿欒锛汣銆丠2鐨勫寲瀛﹁閲忔暟涓1锛屼絾浜х墿涓嶆槸绋冲畾姘у寲鐗╋紝鎵浠モ柍H涓嶄唬琛ㄧ噧鐑х儹锛屾晠C閿欒锛汥銆丆8H18鐨勫寲瀛﹁閲忔暟涓2锛浜х墿鏄ǔ瀹...
绛旓細1mol鍙噧鐗╁畬鍏ㄧ噧鐑х敓鎴愮ǔ瀹氱殑姘у寲鐗╂椂鎵鏀惧嚭鐨勭儹閲忥紝鎵浠ラ夐」C姝ｇ‘锛孉涓簲璇ョ敓鎴怌O 2 锛B涓簲璇ユ槸SO 2 锛孌涓鍙嶅簲鐗〤O涓嶆槸1mol锛岀瓟妗堥塁銆傜偣璇勶細鍏充簬鐕冪儳鐑娉ㄦ剰2鐐癸紝涓鏄弽搴旂墿鏄1mol锛屽叾娆℃槸鐢熸垚鐗╂槸绋冲畾鐨勬哀鍖栫墿锛屽嵆C CO 2 銆丼 SO 2 銆丠 H 2 O ( l ) 銆
绛旓細B 搴旂敓鎴怱O2锛孲鍜孫2鍙嶅簲鍙兘鐢熸垚SO2锛孲O2鍦ㄥ拰O2鍦ㄦ湁鍌寲鍓傦紙浜旀哀鍖浜閽掞級鐨勬儏鍐典笅鐢熸垚SO3锛屼笖涓哄彲閫嗗弽搴 D CO绯绘暟搴斿彉涓1锛岀噧鐑х儹鐨鍖栧鏂圭▼寮鍙嶅簲鐗╃郴鏁板繀椤讳负1 鐕冪儳鐑畾涔夛細鍦101 kPa鏃讹紝1 mol鍙噧鐗╁畬鍏ㄧ噧鐑х敓鎴愮ǔ瀹氱殑姘у寲鐗╂椂鎵鏀惧嚭鐨勭儹閲忥紝鍙仛璇ョ墿璐ㄧ殑鐕冪儳鐑紟鍗曚綅涓簁J/mol ...
绛旓細鏁匒閿欒锛汢銆佺噧鐑х儹瑕佹眰鍙噧鐗╃殑鐗╄川鐨勯噺蹇呴』涓1mol锛屽緱鍒扮殑姘у寲鐗╁繀椤绘槸绋冲畾鐨勬哀鍖栫墿锛孒2O鐨勭姸鎬佸繀椤讳负娑叉侊紝鏁匓閿欒锛汣銆佺儹鍖栧鏂圭▼寮忎腑H2鐨勭墿璐ㄧ殑閲忎笉涓1mol锛岀儹鍖栧鏂圭▼寮忎腑鈻H涓嶇瓑浜庣噧鐑х儹锛屾晠C閿欒锛汥銆佺鍚堢噧鐑х儹鐨勫畾涔夛紝鐑寲瀛︽柟绋嬪紡涓柍H浠ｈ〃鐕冪儳鐑紝鏁匘姝ｇ‘锛庢晠閫塂锛
绛旓細A銆佺敳鐑峰畬鍏ㄧ噧鐑ф椂搴旂敓鎴怌O2锛岀儹鍖栧鏂圭▼寮忎腑鈻H涓嶇瓑浜庣噧鐑х儹锛屾晠A閿欒锛汢銆佺鍚堢噧鐑х儹鐨勫畾涔夛紝鐑寲瀛︽柟绋嬪紡涓柍H浠ｈ〃鐕冪儳鐑紝鏁匓姝ｇ‘锛汣銆丼涓嶈兘涓庢哀姘斿弽搴旂洿鎺ョ敓鎴怱O3锛屾晠C閿欒锛汥銆佺儹鍖栧鏂圭▼寮忎腑CO鐨勭墿璐ㄧ殑閲忎笉涓1mol锛岀儹鍖栧鏂圭▼寮忎腑鈻矵涓嶇瓑浜庣噧鐑х儹锛屾晠D閿欒锛庢晠閫塀锛
绛旓細S鍋氫负鍙嶅簲鐗╋紝姘旀佹椂鏀剧儹杈冨銆傚悓鏃跺張鏄斁鐑弽搴斻傚洜姝ゅ悗鑰呯殑鈻矵灏忎簬鍓嶈呫1mol鐨勫弽搴旀斁鐑紝灏忎簬2mol鐨勭浉鍚屽弽搴旀斁鍑虹殑鐑噺銆傚悗鑰呮斁鐑緝澶氾紝鈻矵杈冨皬銆傜⒊閰搁挋鍒嗚В鏄竴涓惛鐑鍙嶅簲锛屸柍H鏄鍊硷紱鑰屾哀鍖栭挋鍜屾按鏄竴涓斁鐑弽搴旓紝鈻矵涓鸿礋鍊硷紝杩欎釜灏卞緢濂芥瘮杈冧簡銆傛鍊煎ぇ浜庤礋鍊 甯屾湜鑳藉甯姪鍒颁綘~濡傛湁鐤戞儜锛屾杩...
