课程名称︰普通化学丙 课程性质︰系定必修 课程教师︰张大钊 开课学院：生农学院 开课系所︰兽医+植微 考试日期（年月日）︰2010／12／8 考试时限（分钟）：10:20~11:20(60min) 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.A 15.2 g of NO2(g) is placed in a 10 liter flask at high temperature and the flask is then cooled to 27。C. some of NO2 can form N2O4(g) dimers. The final pressure is measured to be 0.5 atm. What pressures and mole fractions of NO2 and N2O4 are present? (10pts) 2.Assuming particles in constant motion in a L^3 cubic box and no interaction with each other. Begin with P=F/A. Based on the model, order the kinetic energy of CH4, N2, Ar, CO2 at room temperature. Copmpare their root mean square velocities. (16pts) 3.Calculate the ratio of distance traveled between NH3 and HCl from two ends of a tube, where v_avg=(8RT/πM)^1/2. Is the calculated value consistent with the experimental result? Why or why not? (10pts) 4.List the necessary empirical terms to derive the collision rate as Z=4N/Vd^2(πRT/M)^1/2. Calculate the collision rate and the mean free path for N2 at 27。C and 1.0 atm. Assume that the diameter of an N2 molecular is 250 pm. (16pts) 5.Derive the van der Waals equation for real gas from the ideal gas law PV=nRT .Explan each term in the van der Waals equation. (8pts) 6.A 30 g mass of liquid cooled from 298。C to 273。C at 1 atm by the extraction of 3.0 kJ of heat. Calculate △H and estimate the specific heat capacity of the sample. (8pts) 7.A 10 g Zn interacts with sufficient HCl to produce H2(g) at 25。C and 1 atm. Calculate w, q, △E, and △H. (8pts) 8.When 2 mol of SO2(g) react completely with 1 mol of O2(g) to form 2 mol of SO3(g) at 25。C and 1 atm, 198 kJ of energy are released as heat, calculate △E and △H. (8pts) 9.A 1.5 g of CH4(g) was burn in the bomb calorimeter with C=11.3kJ/。C, the temp increased by 7.3。C. The value of △H^。f(。右上f右下小字) is -75kJ/mol for CH3OH(l). Cal the △H^。of combustion per gram for CH4(g) and CH3OH(l). (12pts) 10.1 mol of an ideal gas at 25。C change from 10 atm to 1 atm under (a) isothermal, (b)isothermally reversible, and (c)constant volume. Calculate w, q, △E, and △H. (24pts) --

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