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
Harrizon [31]
3 years ago
15

The major source of aluminum in the world this bauxite (mostly aluminum oxide). It’s thermal decomposition can be represented by

:
Al2 O3 (s) —> 2 Al (s) + 3/2 O2 (g)


ΔH rxn = 1676


If aluminum is produced this way, how many grams of aluminum can conform when 1.000×10^3 kJ of heat is transferred?
Chemistry
1 answer:
Artyom0805 [142]3 years ago
7 0

Answer:

The correct answer is 32.2 grams.

Explanation:

Based on the given information, the enthalpy of formation for aluminum oxide is 1676 kJ/mol. It signifies towards the energy that is required to generate aluminum and oxygen, and both of these exhibit zero enthalpy of formation. Therefore, the ΔHreaction is the required energy to generate 2 moles of aluminum. Thus, the energy needed for the formation of single mole of aluminum is,  

ΔHrxn = 1676/2 = 838 kJ/mol

Q or the energy input mentioned in the given case is 1000 kJ. Therefore, the number of moles of Al generated is,  

(1000 kJ) / (838 kJ/Al mole) = 1.19 moles of Aluminum

The grams of aluminum produced can be obtained by using the formula,  

mass = moles * molecular mass

= 1.19 * 26.98

= 32.2 grams.  

You might be interested in
100.mL of a .795 M solution of KBr is diluted to 500.mL. what is the new concentration of the solution?
kap26 [50]

Answer:

0.159 M

Explanation:

convert from mL to L then use the equation:

M1V1 = M2V2

rearrange to find M2

\frac{M1V1}{V2} = M2

\frac{(0.795 M)(0.100 L)}{0.500 L} = 0.159 M

4 0
3 years ago
The energy required to break existing chemical bonds in reactants is called the ______ energy.
mixer [17]

The energy required to break existing chemical bonds in reactants is called the activation energy.

<h3>What is activation energy?</h3>

Activation energy in chemistry is the energy required to initiate a chemical reaction.

Chemical reactions involve the breaking of chemical bonds in substances called reactants to form new substances called products.

The energy required to break the bond in the existing reactants thus elevating these substances to a state of high activation is known as activation energy.

Therefore, it can be said that energy required to break existing chemical bonds in reactants is called the activation energy.

Learn more about activation energy at: brainly.com/question/11334504

#SPJ1

8 0
2 years ago
The atomic bomb detonated in 1945 produced an explosion equivalent to 18,600 tons of TNT from 5 kg of _____.
kvasek [131]
JAPAN GOT NUKED LOL its so funny
3 0
3 years ago
What two general products do combustion reactions create? *
Dimas [21]
It would be carbon dioxide and water.

hope this helps you
7 0
3 years ago
Which of the following Gila Monster adaptations is based on the reproductive cycles of Gambel’s quails and cottontail rabbits?
Natasha_Volkova [10]

Answer:

B

Explanation:

3 0
3 years ago
Other questions:
  • What is the thermal energy needed to completely melt 9.60 mol of ice at 0.0 C
    12·2 answers
  • If r⃗ =bt2i^+ct3j^, where b and c are positive constants, when does the velocity vector make an angle of 45.0∘ with the x- and y
    14·1 answer
  • Hard water deposits (calcium carbonate) have built up around your bathroom sink. which of these substances would be most effecti
    9·2 answers
  • What is the oxidation number of chromium in dichromate ion, cr2o72-?
    7·1 answer
  • Billy the friendly Robot uses 50 N of force to lift a box 2 meters in the air. How much work did Billy perform?
    15·1 answer
  • Consider the conversion of 2-naphthol and 1-bromobutane into an ether via the williamson ether synthesis. list the procedural st
    7·1 answer
  • If the pH is 9, what is the concentration of hydroxide ion? Is this solution
    9·1 answer
  • How many particles are in 2.4 moles of carbon dioxide
    5·1 answer
  • The particle diagram shown above represents the dissolution of CuCl(s) assuming an equilibrium concentration for Cu+ ions of abo
    15·1 answer
  • 3. The reaction between equimolar solutions of silver nitrate and sodium chloride is shown
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!