苯乙烯是重要的基础化工原料,工业上常利用乙苯催化脱氢制备苯乙烯。涉及的反应如下:ⅰ.C6H5C2H5(g)⇌C6H5CH=CH2(g)+H2(g)ΔH1ⅱ.C6H5C2H
反应3:2H2(g)+O2(g)=2H2O(g) △H3=-483.6kJ•mol-1 (1)反应4:C6H5CH2CH3(g)+O2(g)=C6H5CH=CH2(g)+H2O(g) △H4= kJ•mol-1。 (2)较低温度下,向乙苯脱氢的反应体系中加入少量O2,乙苯平衡转化率较高而苯乙烯的选择性较低,其原因可能是 。 (3)向乙苯脱氢反应体系中加入CO2,乙...
3C6H5CHCH2+2KMnO4+4H2O =3C6H5CH(OH)CH2(OH) +2MnO2+2KOH. Enter the amount of any of the substances to determine the ideal amounts to maximize the theoretical yield of the reaction. To find the limiting and excess reagents when a non-ideal a...
C6H5CH=CH2(g)+H2(g) ?△H=+125kJ·mol-1 (1)该反应的平衡常数表达式为K=__ ___。随着温度的升高,K值___(填“增大”、“减小”或“不变”,下同)。 (2)实际生产中常以高温水蒸气作为反应体系的稀释剂(稀释剂不参加反应)。C6H5C2H5的平衡转化率与水蒸气的用量、体系总压强关系如下图。 ①由上...
C6H5CHCH2 + KMnO4 + H2O = C6H5CHCH2OHOH + MnO2 + KOH KF + Br2Mg = KBr + MgF2 CaCl2 + AgNo3 = AgCl + Ca(No3)2 Na2SO3 + KI + H2SO4 = H2O + K2O4S + Na2S + I2 C2H4O + Ag2O = CO2 + Ag + H2O 近期平衡的方程式練習...
苯乙烯是合成树脂、离子交换树脂及合成橡胶等的重要单体,工业常用乙苯作为原料来制备,发生如下反应:主反应I:C6H5C2H5(g)C6H5CH=CH2(g)+H2(g)
聚苯乙烯是一类重要的高分子材料,可通过苯乙烯聚合制得。I.工业常采用乙苯脱氢的方法制备苯乙烯,其原理为:C6H5-CH2CH3(g)C6H5-CH=CH2(g)+H2(g
苯乙烯(C6H5CH=CH2)是生产各种塑料的重要单体,其制备原理是:C6H5C2H5(g) C6H5CH=CH2(g)+H2(g)△H=+125kJ•mol-1(1)该反应的平衡常数表达式为K=c(C6H5CH=CH2)c(H2)c(C6H5C2H5)c(C6H5CH=CH2)c(H2)c(C6
苯乙烯(C6H5CH=CH2)2是合成橡胶和塑料的单体,用来生产丁苯橡胶、聚苯乙烯等.工业上以乙苯C6H5CH2CH3为原料,采用催化脱氢的方法制取苯乙烯,反应方程式为:C6H5CH2CH3(g)⇌C6H5CH=CH2(g)+H2(g)△H (1)已知:H2和CO的燃烧热(△H)分别为-285.8kJ.mol•L-1和-283.0kJ.mol•L-1;C6H5CH2CH3(g...
Ni(O2H2) Co(NO3)2.6(H2O) C6H5C2H3Br2 Recently Calculated Molar Masses Find the Molar Mass of Styrene, C6H5CHCH2Step-by-Step There are 4 easy steps to find the molar mass of C6H5CHCH2 based on its chemical formula. 1. Count The Number of Each Atom ...