对丙烷进行溴代反应,反应一段时间后得到如下结果:2CH3CH2CH3+Br2光,127℃CH3CH2CH2Br(3%)+CH3CHBrCH3(97%)+2HBr已知:正丙基结构简式CH3CH2CH2-、异丙基结构简式(CH3)2CH-,反应机理中链转移决速步为RH+Br·→R·+HBr,其反应势能变化如图所示。下列说法正确的是势能B CH3CHCH3+Br·反应进程 A. 物质组合...
298.15K,CO〔〕与CH3OH〔g〕标准摩尔生成焓.K, CO〔〕.H(g).CH3OH(I)标准摩尔熵S分别为197.67,130.68及127J.摩尔汽化热蒸气可是为理想气体。利用上述数据,求298.05K时,反响CO〔〕+2 H(g)= CH3OH〔g〕及。 相关知识点: 试题来源: 解析 解: 101.325KPa CO〔〕+2 H(g)CH3OH〔g〕101.325Kpa CH3OH...
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In a series of MSnI3 compounds (M = K, NH4 , Rb, Cs, CH3NH3) two types of coordination around the central Sn(II) were found by 127I-NQR and powder X-ray diffraction techniques. They are square pyramidal (for M = NH4 , Rb) and octahedral (for M = CH3NH3). CsSnI3 , on the...
T℃时.在1L的密闭容器中充入2mol CO2和6mol H2.一定条件下发生反应:CO2+H2O(g)△H=-49.0kJ/mol.测得H2和CH3OH(g)的浓度随时间变化如下图所示.下列说法不正确的是( ) A.0-10 min 内υ(H2)=0.3 mol/B.T℃时.平衡常数K=127.CO2与H2的转化率相等C.T℃时.若上述反应中有64 g
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The 81Br and 127I NQR spectra were recorded in CH3NH3 HgBr3 and CH3NH HgI3 , respectively. In addition to a phase transition at 338 K, successive phase transitions take place at 127 ± 1, 184±1 and 243±5 K in CH3NH3 HgBr3. On heating, the resonance lines of CH3NH3HgI3 disapp...
用系统命名法命名下列化合物: (1) 名称是: (2) 名称是: 3CH3 名称是: 2 名称是: (5) 名称是: (6) 名称是:
写出该烯烃的结构简式.CH3..|.某一烯烃的分子式为C5H10,与溴化氢发生加成反应生成CH3—CH—CH—CH3..|..Br.
[解答]解:由:①2CH3OH〔l〕+3O2〔g〕=2CO2〔g〕+4H2O〔g〕△H=﹣127kJ/mol,②H2O〔l〕=H2O〔g〕△H=+44.0kJ/mol,那么根据盖斯律可知〔①+②×2〕÷2即得到CH3OH〔l〕+O2〔g〕=CO2〔g〕+2H2O〔l〕△H=﹣72kJ/mol,故答案为:CH3OH〔l〕+O2〔g〕=CO2〔g〕+2H2O〔l〕△H=﹣72k...