正在加载图片...
2.理想气体经节流膨胀过程: A.AT>0 AU>0 B.△T-0AU>0 C.AT<0△U>0 D.△T=0AU=0 3.水的凝固点降低常数为1.86 K.mor.kg,在水中溶解少量的非挥发性溶质B 形成理想稀溶液,测得溶液凝固点为-0.50℃,该溶液B的质量摩尔浓度为 A.0.1 mol-kg B.0.27 mol-kg C.0.37 mol-kg D.0.93 mol-kg" 4.PCl的分解反应PC5(g)=PCl(g)+Ch(g)在473K达到平衡时PCls(g)有 48.5%分解,在573K达到平衡时,有97%分解,则此反应是: A.吸热反应 B.放热反应 C.反应的标准摩尔焓变为零的反应 D.在这两个温度下标准平衡常数相等的反应 5.己知水的摩尔蒸发焓为40668J小mo',50℃时水的饱和蒸汽压为: A.101.325kP B.5.308kPa C.771kPa D.13.308kPa III.(1)A sample consisting of 1.0 mol of a monatomic perfect gas is changed irreversibly and adiabatically to 273K and 100kPa.Given that A S=20.9JK. mor,W=1255J,and the molar entropy of the final state of its gas Sm=188.3J mol.Kl.Calculate△U,△H,△G (2)Derive the relation: (aH =-T +v ar IV.A and B are two partially miscible liquids at 25C.The binary system consists of two phases(I and l2)in equilibrium with each other.The compositions of the two phases (I and l2)in equilibrium are XB.1=0.98 and XB.2=0.01,respectively 2 PDF文件使用“pdfFactory Pro”试用版本创建ww,fineprint.con,cn2 2. 理想气体经节流膨胀过程: A.ΔT>0 DU >0 B.ΔT=0 DU>0 C.ΔT<0 DU>0 D.ΔT=0 DU =0 3. 水的凝固点降低常数为 1.86K×mol-1 ×kg,在水中溶解少量的非挥发性溶质 B 形成理想稀溶液,测得溶液凝固点为-0.50℃, 该溶液 B 的质量摩尔浓度为: A. 0.1 mol×kg-1 B. 0.27 mol×kg-1 C. 0.37 mol×kg-1 D. 0.93 mol×kg-1 4. PCl5 的分解反应 PCl5(g)= PCl3 (g) + Cl2(g) 在 473K 达到平衡时 PCl5(g)有 48.5%分解,在 573K 达到平衡时,有 97%分解,则此反应是: A. 吸热反应 B. 放热反应 C. 反应的标准摩尔焓变为零的反应 D. 在这两个温度下标准平衡常数相等的反应 5. 已知水的摩尔蒸发焓为 40668 J•mol-1,50℃时水的饱和蒸汽压为: A. 101.325 kPa B. 5.308 kPa C. 771kPa D. 13.308 kPa III.(1)A sample consisting of 1.0 mol of a monatomic perfect gas is changed irreversibly and adiabatically to 273K and 100kPa. Given thatΔS=20.9J•K -1• mol-1 , W=1255J,and the molar entropy of the final state of its gas Sm=188.3J• mol-1•K -1 . CalculateΔU,ΔH,ΔG. (2)Derive the relation: V T V T p H T p ÷ + ø ö ç è æ ¶ ¶ = - ÷ ÷ ø ö ç ç è æ ¶ ¶ IV. A and B are two partially miscible liquids at 25℃. The binary system consists of two phases (l1 and l2) in equilibrium with each other. The compositions of the two phases (l1 and l2) in equilibrium are XB,1=0.98 and XB,2=0.01, respectively. PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有