1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena55 [62]
2 years ago
13

Given the following thermodynamic data, calculate the lattice energy of LiCl:

Chemistry
1 answer:
tiny-mole [99]2 years ago
3 0

Answer:

\boxed{\text{-862 kJ/mol}}

Explanation:

One way to calculate the lattice energy is to use Hess's Law.

The lattice energy U is the energy released when the gaseous ions combine to form a solid ionic crystal:

Li⁺(g) + Cl⁻(g) ⟶ LiCl(s); U = ?

We must generate this reaction rom the equations given.

(1)  Li(s) + ½Cl₂ (g) ⟶ LiCl(s);      ΔHf°     = -409 kJ·mol⁻¹

(2) Li(s) ⟶ Li(g);                          ΔHsub =    161 kJ·mol⁻¹

(3) Cl₂(g) ⟶ 2Cl(g)                     BE        =   243 kJ·mol⁻¹

(4) Li(g) ⟶Li⁺(g) +e⁻                   IE₁         =   520 kJ·mol⁻¹

(5) Cl(g) + e⁻ ⟶ Cl⁻(g)                EA₁       =  -349 kJ·mol⁻¹

Now, we put these equations together to get the lattice energy.

                                                <u>E/kJ </u> 

(5) Li⁺(g) +e⁻ ⟶ Li(g)                520

(6) Li(g) ⟶ Li(s)                         -161

(7) Li(s) + ½Cl₂(g) ⟶ LiCl(s)     -409

(8) Cl(g) ⟶ ½Cl₂(g)                   -121.5

(9) Cl⁻(g) ⟶ Cl(g) + e⁻               <u>+349</u>

      Li⁺(g) +  Cl⁻(g) ⟶ LiCl(s)     -862

The lattice energy of LiCl is \boxed{\textbf{-862 kJ/mol}}.

You might be interested in
Potassium (K) and calcium fluoride (CaF2) can both be classified as<br> (Please help)
nasty-shy [4]
Potassium and calcium fluoride are both metals
8 0
3 years ago
The gold-foil experiment was used to discover which subatomic particle? Question 2 options: electrons protons ==&gt; neutrons (m
Gelneren [198K]
Proton, the gold foil experiment indicated that the nucleus has a positive charge.
8 0
2 years ago
Read 2 more answers
What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.15 M buffer solution at pH 5.0? Not
Leni [432]

Answer:

Acetic acid 0,055M and acetate 0,095M.

Explanation:

It is possible to prepare a 0,15M buffer of acetic acid/acetate at pH 5,0 using Henderson-Hasselblach formula, thus:

pH = pka + log₁₀ [A⁻]/[HA] <em>-Where A⁻ is acetate ion and HA is acetic acid-</em>

Replacing:

5,0 = 4,76 + log₁₀ [A⁻]/[HA]

<em>1,7378 =  [A⁻]/[HA] </em><em>(1)</em>

As concentration of buffer is 0,15M, it is possible to write:

<em>[A⁻] + [HA] = 0,15M </em><em>(2)</em>

Replacing (1) in (2):

1,7378[HA] + [HA] = 0,15M

2,7378[HA] = 0,15M

[HA] = 0,055M

Thus, [A⁻] = 0,095M

That means you need <em>acetic acid 0,055M</em> and <em>acetate 0,095M</em> to obtain the buffer you need.

i hope it helps!

7 0
3 years ago
Select the correct answer.
Step2247 [10]

Answer:

Vanadium(V) oxide is the inorganic compound with the formula V2O5. Commonly known as vanadium pentoxide,

Explanation:

then it is answer D

5 0
2 years ago
We can drink water straight from the ocean without purifying it. <br><br><br><br> True<br><br> False
xenn [34]

False. The water would be toxic without purifying it before drinking.

7 0
2 years ago
Read 2 more answers
Other questions:
  • Which method used to attack ground cover fires is generally used against fires that are very hot, very big, and very fast?
    11·1 answer
  • If element X has 25 protons, how many electrons does it have?
    6·2 answers
  • What is the purpose of the three R’s of resource management?
    11·2 answers
  • Which is most likely a covalent compound?<br><br> LiF<br> MgS<br> NH3<br> CaCl2
    12·2 answers
  • Mixtures are different from compounds because compounds have to be
    7·2 answers
  • Which information is sufficient to differentiate a
    7·2 answers
  • What is the reactant for sodium nitrate + water?
    14·1 answer
  • Think of the different types of reactions you have learned about. How can you tell if they absorb energy or release energy, and
    13·1 answer
  • How can a chemical reaction be sped up?Select from the drop-down menu to correctly complete the statement.
    8·2 answers
  • K3PO4(aq)+MgCl2(aq)⟶
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!