Bài tập trắc nghiệm và đáp án môn hóa đại cương Chap 13 14 merged

Bài tập trắc nghiệm và đáp án môn hóa đại cương Chap 13 14 mergedBài tập trắc nghiệm và đáp án môn hóa đại cương Chap 13 14 merged

Short-test II

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2 yf A by a facter0f 4 will cause the reaction <i rate to

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fuel in hand-held, disposable lighters at its boiling point ofZO.5 oC)

Given that, the enthalpy of vaporization s23 kJ/mol.)

constant{Ke}n a particular condition is[10.\A mixture with concentration

[A]=0.02, [B]=[C]=[D]=0.01M The state of this system is:

O Unable to predict the state of the reaction

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© The system is at equilibrium

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The standard molar enthalpy change isloos.J i for the oxidation of ammonia

502(g) > 4NO(g) + 6H:O(g)

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enthalpies-eftormation: AH s[NO(g)] = +90.3 kJ/mol; and AH’ s[H2O0(g)] = -241.8 kJ/mol

5/15/22, 2:23 PM Câu hỏi trắc nghiệm trống

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statements is FALSE?

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©) The reaction is first order(n A)

| ©) The reaction is first seen A)

Câu trả lời đúng

@ The reaction is first order in B

x⁄ At the standard sate, which of the following subtances has astandard *1/1

Enthalpy of formation ofzero? (1) 02 (g) (2) Feter— fg (4)

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5/15/22, 2:23 PM Câu hỏi trắc nghiệm trống

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() Adding catalyst

x⁄ The equilibrium constant Kp for the following reaction is 5.Ox1O^8 at *1/1

250C N2(g) + 3H2(g) = 2NH3(g) Given that R = 8.314 J/(molxK) The

value of Delta Go for this reaction at is kjimol

x⁄ Areaction that is spontaneous at any temperature if the signs of Delta *1/1

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The vapor pressure of pure water at 25 69m Determine the *0/1 vapor pressure (torr) of water at 25 °C aes Solution prepared by

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dissolving 35 gof urea (a nonvolatile, non-electrolyte, MW = 60.0

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5/15/22, 2:23 PM Câu hói trắc nghiệm trống

v⁄ƒ A solution made by dissolving 9.81 q @f a nonvolatile nonelectrolytein *1/1

90.0 g of water boiled at 100.37 oC at 760 mm Hg What is the

X_ For aspecific reaction, which of the following statements can be made *0/1

about K, the equilibrium constant?

Câu trả lời dung

)_It changes with changes in the temperature

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5/15/22, 2:23 PM Câu hói trắc nghiệm trống

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Reaction orders are always integer

© The order of réấction describes how much a change in the amount of eấch x<

substance affects the overall rate

The overall order of a reaction is the sum of all order of reactants in the tao

O Rate laws provide a mathematical description of how cpaes in the amount of a

substance affect the rate of a chemical reaction

Câu trả lời đúng

@ Reaction orders are always integer

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5/15/22 2:23 PM Câu hỏi trắc nghiêm trống

Y Solubility curves of several substance is given the below graph A *1/1

sample of KCI (90 g) is dissolved in 250 g of water at SOC with

precautions taken to avoid evaporation of any water This solution is

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(_) supersaturatea

Y 1 Caffeine is about 10 times as soluble in hot water as in cold water A *1/1

chemist puts a -water extract of caffeine into an ice bath, and some

caffeine crystallizes| Is the remaining solution saturated, unsaturated,

= 2S03(g).For initial concentrations of SO2 and O2 of 2.0 M and 1.5 M,

ẩ Pane re ‘ ———

measured to be An 80 M What is the value of Ke for this rea

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x⁄_ The freezing point of ethanol (C2HSOH, MW= 46 g/mol) is -114.6 °C The *1/1

molal freezing point depression constant for ethanol is 2.00 °C/m What

glycerin (C3H803, MW= 92 ginoeeere BE in 200.0 g of

thanol?

VY The freezing point of ethanol (C2HSOH, MW= 4ó g/mol) is[“114.6 °CỀThe *1/1

molal freezing point depression constant for ethanol is 2.00 °C/m What

is the freezing point (°C) of a solution prepared by dissolving 46.0 g of

encores MW= 92 92 gimolfrere Zfectrolvi) inQ00.0 59