大学MOOC 物理化学动力学专题(苏州大学)1206140820 最新慕课完整章节测试答案
Chapter2.KineticTheoryofGases气体分子运动理论
Chapter2Quiz
1、单选题：
比大小：<v^3>_____<v><v^2>
选项：
A: >
B: =
C: <
D: 无法判断
答案: 【 >】
2、单选题：
O2和CCl4的平均速度比值为：<v>(O2) : <v>(CCl4)=
选项：
A: 2.19
B: 0.46
C: 4.80
D: 0.21
答案: 【 2.19】
3、单选题：
A Knudsen cell can be used to measure ______ of a material.
选项：
A: the molar mass
B: the temperature
C: vapor pressure
D: average speed
答案: 【 vapor pressure】
4、判断题：
The average speed is where the maximum value the distribution function is.
选项：
A: 正确
B: 错误
答案: 【 错误】
5、判断题：
Doubling the absolute temperature will double the average speed of molecules
选项：
A: 正确
B: 错误
答案: 【 错误】
6、填空题：
Cars were timed by police radar as they passed in both directions below a bridge. Their velocities (km/hr, numbers of cars in parentheses) to the east (E) and west (W) were as follows: 80 E (40), 85 E (62), 90 E (53), 95 E (12), 100 E (2); 80 W (38), 85 W (59), 90 W (50), 95 W (10), 100 W (2). The RMS speed is _______ (请保留小数点后一位）
答案: 【 86.4】
7、填空题：
The ratio of average speed and average
translational kinetic energy of of CH4 and N2 at 298K is ______
答案: 【 1】
8、填空题：
The escape velocity from Earth’s surface is given by v=(2gR)^(1/2) where g is the gravitational acceleration (9.807 m/s^2) and R is the radius of earth (6.37×10^6 m). When the most probable speed for N2 be equal to the escape velocity, the temperature (in K) is at the order of _____ (仅答数量级就可以了）
答案: 【 5】
9、填空题：
The most probable velocity in one-dimension is __
答案: 【 0】
10、填空题：
The temperature at the tropopause is 220 K, and the collision frequency of N2 is 3.16 x 10^9 s^(-1). the mean free path of N2 at this altitud