Question : 41.The reaction shown below at equilibrium. Use Le Chatelier’s principle : 1318412

 

 

41.The reaction shown below is at equilibrium. Use Le Chatelier’s principle to predict the effect of adding ammonia gas to the equilibrium reaction mixture.

N2(g) + 3H2(g) 2NH3(g)

A)The equilibrium position will remain unchanged.

B)The equilibrium position will shift to the right.

C)The equilibrium position will shift to the left.

D)The equilibrium constant will increase.

E)All of the nitrogen gas will be used up.

 

42.Thermodynamics is best described as which of the following?

A)the study of the rates at which reactions take place

B)the field of chemistry that determines the mechanisms of reactions

C)the study of Le Chatelier’s Principle

D)the study of energy, work, and heat

E)the study of the mass relationships in chemical reactions

 

43.A reaction will be spontaneous at all temperatures under which conditions?

A)The reaction is endothermic and accompanied by an increase of disorder.

B)The reaction is endothermic and accompanied by a decrease in disorder.

C)The reaction is exothermic and accompanied by an increase in disorder.

D)The reaction is exothermic and accompanied by a decrease in disorder.

E)The reaction has a positive value for free energy change.

 

44.Which of the following represents an exothermic reaction?

A)A(g) + B(g) ? 2C(g) ?H = +100 kcal

B)A(g) ? B(g) + 33 kcal

C)50 kcal + 2A(g) ? C(g) + D(s)

D)Both A and B are exothermic reactions.

E)Both A and C are exothermic reactions.

 

45.Which of the following is a process with a negative ?S?

A)H2O(l) ? H2(s)

B)CO2(s) ? CO2(g)

C)CaCO3(s) ? CaO(s) + CO2(g)

D)dissolving sugar in water

E)None of the choices are correct; ?S cannot be negative.

 

46.10.0 grams of octane are burned in a bomb calorimeter containing 2.00 ? 102 g H2O. If  the water temperature increases from 25.00oC to 37.00oC, how much energy was released by the system?

A)  7.40 kcal    B)  3.00 ? 103 kcal    C)  2.52 kcal    D)  1.65 kcal    E)  2.40 kcal

 

47.Which of the following will NOT increase the rate of a reaction?

A)increasing the size of the reaction vessel

B)adding a catalyst

C)increasing the temperature

D)increasing the concentration of the reactants

E)All of the above will increase the rate of a reaction.

 

48.For the reaction 2H2(g) + S2(g) 2H2S(g), determine the equilibrium constant at 700oC if at this temperature, the equilibrium concentrations are as follows:

[H2] = 0.208 M, [S2] = 1.13 ? 10-6 M, [H2S] = 0.725 M

A)  3.22 ? 106    B)  1.08 ? 107    C)  3.49    D)  4.55 ? 10-7    E)  441

 

49.Which of the following is a true statement concerning the specific heat of a substance?

A)Specific heat is the amount of heat required to raise one gram of a substance by one degree Celsius.

B)Specific heat is 1.00 cal for all substances.

C)Specific heat is the change in the temperature of a substance as it absorbs heat.

D)Specific heat is the amount of heat required to raise a mole of a substance by ten degrees.

E)Specific heat is the heat given off in a chemical reaction.

 

50.Which of the following pairs of substances has the substance with the highest entropy listed first?

A)Ni(s), Br2(l)D)Ne(g), H2O(l)

B)Hg(l), He(g)E)Both A and D are correct.

C)Br2(l), H2O(g)

 

 

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more