2021 Physical Chemistry(Dalian University of Technology) 最新满分章节测试答案

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本课程起止时间为:2021-08-27到2021-12-27
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Chap 6 Chemical kinetics -4 Chemical kinetics-quiz

1、 问题:The rate coefficient of a certain reaction was 0.231 , and the initial concentration of reactants was 0.5, so the half-life of the reaction was
选项：
A:3 min
B:8.66 min
C:18.78 min
D:50.5 min
答案: 【3 min】

2、 问题:The addition of a catalyst can change which of the following physical quantities of a chemical reaction: 
选项：
A:The standard molar enthalpy of the reaction
B:The standard equilibrium constant
C:The standard molar entropy of the reaction
D:Rate coefficient of the reaction
答案: 【Rate coefficient of the reaction】

3、 问题:There is a chemical reaction which has only one reactant. Its rate coefficient k=0.05.The initial concentration of the reactant is 0.4 . When the reaction rate drops to 1/4 of the initial rate, the required time is: 
选项：
A:0.5 s
B:1.38 s
C:50 s
D:13.86 s
答案: 【50 s】

4、 问题:There is a consecutive reaction where all the elementary steps are in the same reaction order. The reaction is carried out under constant volume condition. If we want to obtain the maximum yield of the intermediate, we shall: 
选项：
A:Control the appropriate response time
B:Control an appropriate reaction temperature
C:Increase the concentration of reactant A
D:Increase the reaction rate
答案: 【Control the appropriate response time】

5、 问题:For a reaction A→B, if the concentration of reactant A is reduced by half, its half-life is also reduced by half, then the reaction order of this reaction is: 
选项：
A:zero order
B:first order
C:second order
D:third order
答案: 【zero order】

6、 问题:The relation between the rate coefficient k of a reaction and the rate coefficients of each elementary reactions is , then the relation between the apparent activation energy E of the reaction and the activation energy , , and  of each elementary reaction is:
选项：
A:
B:
C:
D:
答案: 【】

7、 问题:For a first-order gas-phase parallel reaction:  A → B, A → C, where the pre-exponential factor, activation energy , and all of them are independent of temperature. It is now measured that  is 100 at 298 K, and the value of  at 754 K is
选项：
A:2500
B:2.5
C:6.2
D:Lack of activation energy data and cannot be solved
答案: 【6.2】

8、 问题:For secondary reactions, the lower the initial concentration, the shorter the time required when the reactants convert the same percentage. 
选项：
A:正确
B:错误
答案: 【错误】

9、 问题:According to the activated complex theory, the saddle point on the potential energy surface is the highest point of energy. 
选项：
A:正确
B:错误
答案: 【错误】

10、 问题:If the rate of a reaction is first order kinetic, it must be a monomolecular reaction. 
选项：
A:正确
B:错误
答案: 【错误】

Chap 1 the first law of thermodynamics -2 the first law of thermodynamics-quiz

1、 问题:Which of the following quantities is path-dependent?
选项：
A:W
B:Q+W
C:U
D:all of the above
答案: 【W】

2、 问题:Which of the following quantities is intensive property?
选项：
A:temperature
B:volume
C:internal energy
D:mass
答案: 【temperature】

3、 问题:Which of the following statements about internal energy is wrong？
选项：
A:U is state function
B:U is an extensive property
C:the absolute value of U is unknown
D:U is path-dependent   
答案: 【U is path-dependent   】

4、 问题:The standard enthalpy of combustion of C5H12 (g) is -3520 kJ/mol, the standard enthalpies of formation of CO2 (g) and H2O (l) are -395 kJ/mol and -286 kJ/mol, respectively. Calculate the standard enthalpy of formation of C5H12 (g):
选项：
A:-171 kJ/mol
B:171 kJ/mol
C:2839 kJ/mol
D:-2839 kJ/mol
答案: 【-171 kJ/mol】

5、 问题:The constraint for the equation Qv=ΔU is
选项：
A:closed system, constant V, W’=0
B:constant V, W’=0
C:closed system, constant p, W’=0
D:closed system, constant p
答案: 【closed system, constant V, W’=0】

6、 问题:Which of the following quantities is zero?
选项：
A:
B:
C:
D:
答案: 【】

7、 问题:
选项：
A:<
B:>
C:=
D:it depends
答案: 【<】

Chap 2 The second and third law of thermodynamics -3 The second and third law of thermodynamics-quiz

1、 问题:The chemical potential of 1 mol of ideal gas at 300 K and 100 kPa is μ1，while that is μ2 at 300 K and 80 kPa. Then μ1______μ2
选项：
A:>
B:<
C:=
D:it depends
答案: 【>】

2、 问题:A heat engine operates between two temperatures 400 °C and 50 °C, calculate the maximum efficiency of this heat engine?
选项：
A:52.0 %
B:75.0 %
C:25.0 %
D:87.5 %
答案: 【52.0 %】

3、 问题:Which of the following processes (under constant T and p) displays a negative S ？
选项：
A:NH4NO3 (s) dissolving in water
B:H2O(g) →H2(g) + 1/2 O2(g)
C:Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)
D:
答案: 【】

4、 问题:Which of the following statements about entropy is wrong?
选项：
A:entropy is state function
B:entropy is an extensive property
C:the absolute value of entropy is unknown
D:the unit of entropy is J/K

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