NH4I (s) NH3(g) + HI(g) A mass of 5 g of NH4I is sealed in a 2.00L flask and heated to 673K. If 2.56g NH4I(s) remain unreacted when the system has reached equilibrium, what is the equilibrium constant (Kp) for the reaction? (R = 0.0821)

The value of ##K_P## is 0.2.

1. Calculate mass of NH₄I reacted.

You started with 5 g of NH₄I and ended up with 2.56 g at equilibrium. So

Mass of NH₄I reacted = 5 g – 2.56 g = 2.4 g (1 significant figure + 1 guard digit.

2. Calculate moles of NH₃ and HI formed.

NH₄I(s) ⇌ NH₃(g) + HI(g)

Moles of NH₃ formed = ##2.4″ g NH”_4″I” × (“1 mol NH”_4″I”)/(“144.94 g NH”_4″I”) × (“1 mol NH”_3)/(“1 mol NH”_4″I”) = “0.017 mol NH”_3##

Moles of HI formed = ##”0.017 mol NH”_3 × “1 mol HI”/(“1 mol NH”_3) =
“0.017 mol HI”##

3. Calculate partial pressures of NH₃ and of HI.

##PV = nRT##

##P_”NH₃” = P_”HI” = (nRT)/V = (“0.017 mol” × “0.0821 L·atm·K”^-1″mol”^-1 × “676 K”)/”2.00 L”## = 0.47 atm

4. Calculate ##K_P##.

##K_P = P_”NH₃”P_”HI”## = 0.47 × 0.47 = 0.2

Note: The answer can have only 1 significant figure, because that is all you gave for the starting mass of NH₄I. If you need more precision, you will have to recalculate.

Show more

Calculate Your Essay Price
(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:
The price is based on these factors:
Academic level
Number of pages
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

Order your essay today and save 10% with the coupon code: best10