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110年 - 110 國立臺北科技大學_碩士班招生考試_分子科學與工程系有機高分子碩士班(乙組)：化工熱力學#102090

科目：研究所、轉學考(插大)◆化工熱力學與反應工程 | 年份：110年 | 選擇題數：20 | 申論題數：4

試卷資訊

所屬科目：研究所、轉學考(插大)◆化工熱力學與反應工程

選擇題 (20)

1.What are the important variables controlling the physical properties of a gas? (A) pressure (B) temperature (C) volume (D) all of the above (E) color
2.Compared to a real gas at very high pressure, and ideal gas occupies? (A) more volume (B) less volume (C) same volume (D) unpredictable (E) no correlation
3.Which of the following statement is not the assumption of kinetic theory? (A) The gas consists of molecules of mass m in ceaseless random motion (B) The size of the molecules is negligible (C) The molecules do not interact with each other (D) The molecules make perfectly elastic collisions when they are in contact (E) Internal modes of motion are excited when molecules making collision
4.According to kinetic theory, the most probably speed increases with T and with decreasing molar mass, and simultaneously the distribution becomes broader? (A) increases with T (B) decreases with T (C) increases with molar mass (D) distribution becomes narrower (E) none of the above answer is correct
5.Under the same condition, compare the root mean square (r.m.s.) speed (c), the mean speed (c" ), and the most probably speed (c*) of molecules? (A)c*＞c"＞c (B)c" ＞c*＞c (C)c＞c"＞c* (D)c*=c"=c (E) none of the above answer is correct

6.Please estimate the time taken to complete adsorb one monolayer of CO at 300 K under the ambient pressure of 6166735951738.jpg Torr. (A) 3 seconds (B) 300 seconds (C) 30 minutes (D) 3 hours (E) none of the above answer is correct
7.Which of the following condition is not for real gas? (A) high pressure (B) high temperature (C) low mean free path (D) condensation may occur (E) none of the above answer is correct
8.Which of the following statement is not correct for repulsive forces? (A) only significant when molecules are almost in contact (B) short-range interaction (C) the gas is less compressible (D) assist expansion (E) none of the above answer is incorrect

9.The molar volume of a perfect gas at 500 K and 100 bar is 0.416 616673a09f9ef.jpg. The molar volume of CO2 under the same conditions is 0.366 616673b5bafa1.jpg. Which interaction dominate the CO2 behavior at 500 K? (A) repulsive forces (B) attractive forces (C) van der Waals forces (D) electronic forces (E) none of the above answer is correct
10.The temperature at which the properties of the real gas coincide with those of the perfect gas as P -＞ 0? (A) critical temperature (B) Boyle temperature (C)boiling temperature (D) frozen temperature (E) none of the above answer is correct
11.The critical temperature of O2 is 154.8 K. At which temperature that O2 can not be liquified by compression alone? (A) 100 K (B) 120 K (C) 140 K (D) 160 K (E) none of the above answer is correct
12.About the van der Waals equation, which statement is incorrect? (A) is the approximate equation of state for real gas (B) van der Waals coefficients are characteristic of each gas (C) van der Waals coefficients are independent of the temperature (D) combine effect of repulsion and attraction (E) none of the above answer is incorrect
13.Gibbs energy always increases when the pressure of the system is increased at constant temperature and composition. Which phase of the molar Gibbs energy is more sensitive to pressure? (A) gas (B) liquid (C) solid (D) the change of molar Gibbs energy to pressure does not depend on material phase (E) none of the above answer is incorrect
14.Which of the below statement is incorrect? (A) Real gases at the same reduced volume and same reduced temperature exert the same reduced pressure (B) Ideal gases at the same volume and same temperature exert the same pressure (C) Real gases at the same volume and same temperature exert the same pressure (D) Ideal gases at the same reduced volume and same reduced temperature exert the same reduced pressure (E) none of the above answer is incorrect
15.Which of the below statement is correct for closed system? (A) can exchange energy but not matter with surrounding (B) can exchange matter but not energy with surrounding (C) neither matter nor energy can crosses the boundary of the system (D) both matter and energy can crosses the boundary of the system (E) none of the above answer is correct
16.Work done in a free expansion is? (A) positive (B) negative (C) zero (D) dependent on temperature (E) none of the above answer is correct
17.Which of the below properties is not the intensive property? (A) pressure (B) temperature (C) density (D) heat (E) specific volume
18. Can the maximum work done by the system be greater than the decrease of internal energy? (A) Yes, if the change occurs with a decrease in system entropy (B) Yes, if the change occurs with an increase in system entropy (C) No, the maximum work done by the system is always smaller than the decrease of internal energy (D) No, the maximum work done by the system is equal to the decrease of internal energy (E) No, the maximum work done by the system is not related to the change of internal energy
19.In an isothermal process, the internal energy of gas (A) decrease (B) no change (C) increase (D) unpredictable change (E) depends on the pressure
20. Which of the below statement is incorrect for the isothermal compressibility? (A) can be obtained from the slope of the plot of volume against pressure at constant temperature (B) for ideal gas, the isothermal compressibility is inversely proportional to pressure (C) The higher the pressure of the gas, the lower its compressibility (D) is a measure of the fractional change in volume when the pressure is increased by a small amount at constant temperature (E) none of the above answer is incorrect

申論題 (4)

二、簡答題:(每題分數如題前說明,每题10分,共40分)
1.(本題總分10%)Please gvetw experimenta eslts to show the existence of real gas.
2.(本題總分10%) Use the principle of corresponding states to suggest the pressure and temperature at which 1.0 mol of CO2 will be in states that correspond to 1.0 mol N2 at 1.0 atm and 25 C. (For N2, Pc = 33.54 atm, Tc=126.3 K, For CO2, Pc = 72.9 atm, Tc = 304.2 K. Pc: critical pressure； Tc: critical temperature)

3.(本題總分10%)Give physical explaation why constant-pressue heat capcity(Cp) is

larger than constant-volume heat capacity (Cv)?
4.(本題總分10%) How to determne the spontacos diection of change?