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2020 Physics and Chemistry Comprehensive Practice Questions and Answers for Adult College Entrance Examination10

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    【Abstract】 Physical-chemical integration of adult college entrance examinations is a relatively important subject compared to college entrance examination candidates. For the convenience of candidates, the editor has compiled the physical and chemical synthesis for the college entrance examination for adults. The following is "Physics and Chemistry Comprehensive Practice Questions and Answers for Adult College Entrance Examination for 2020". I hope it will be useful to everyone!

    Recommended reading : 2020 Physics and Chemistry Comprehensive Practice Questions and Answers for Adult College Entrance Examination

    2020 Physics and Chemistry Comprehensive Practice Questions and Answers for Adult College Entrance Examination10

    1. At 0 ° C, the mol occupied volume of a gas is L, and its pressure is approximately D.

    A, atm; B, 76 mmHg; C, 273 atm; D, 22.4 atm.

    2. Contrast temperature is the ratio of the representative temperature T to which of the following:

    A, critical temperature TC; B, boiling temperature Tb C, Boyle temperature TB; D, 273 K.

    3. When the pressure of the system is higher than atmospheric pressure, which formula should be used? B

    A. Absolute pressure = atmospheric pressure-gauge pressure; B. Absolute pressure = atmospheric pressure + gauge pressure;

    C. Absolute pressure = atmospheric pressure-vacuum degree; D. Absolute pressure = atmospheric pressure + vacuum degree.

    4. The following groups of physical quantities of the system are state functions: C

    (A) T, p, Q; (B) m, Qp, V;

    (C) T, p, U; (D) T, p, W.

    5. Which of the following physical quantities of the system is not a state function. C

    (A) H; (B) G; (C) Q; (D) U.

    6. Which of the following physical quantities is the strength property of the system? C

    (A) H, Vm (B) Cp, T (C) Vm, T (D) V, r

    7. The mathematical expression of the first law of thermodynamics only applies to: B

    (A) Ideal gas (B) Closed system (C) Isolated system (D) Open system

    8. The efficiency of the Carnot heat engine working between two large heat sources at 00 ° C and 25 ° C is: A

    (A) 20% (B) 25% (C) 75% (D) 00%

    9. H2 and O2 react to form water in a thermally insulated steel cylinder, in the process B

    (A) DH = 0 (B) DU = 0 (C) DT = 0 (D) Dp = 0

    10. The constant-pressure heat effect of the reaction H2 (g) + O2 (g) = H2O (g) is DH, then the reaction heat is: B

    (A) Heat of combustion of H2 (g) (B) Heat of formation of H2O (g)

    (C) Heat of formation of H2O (l) (D) Heat of formation of H2O

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