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
Ierofanga [76]
3 years ago
10

What is the value for ∆Soreaction for the following reaction, given the standard entropy values? 2 Al (s) + 3Cl2(g) 2AlCl3(s)

Chemistry
2 answers:
ICE Princess25 [194]3 years ago
7 0

Answer: -503 J/K

Explanation:

The balanced chemical reaction is,

2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3

The expression for enthalpy change is,

\Delta S=\sum [n\times S^0(product)]-\sum [n\times \Delta S^0(reactant)]

\Delta S=[(n_{AlCl_3}\times S_{AlCl_3})]-[(n_{Cl_2}\times S_{Cl_2})+[(n_{Al}\times S_{Al})]

where,

n = number of moles

Now put all the given values in this expression, we get

\Delta S=[(2\times 111)]-[(3\times 223)+(2\times 28)]

\Delta S=-503J/K

Therefore, the entropy change for this reaction is, -503J/K

svetlana [45]3 years ago
5 0
2Al(s) + 3Cl₂ → 2AlCl₃

Forming the equation:
2(28) + 3(223) = ΔH + 2(111)
ΔH = 503 kJ

Writing this outside of the reaction equation:
ΔH = -503 kJ

You might be interested in
Assume the volume of the crew cabin is 74,000 L. The pressure is maintained at around 1.00 atm, ideally with an 80% nitrogen and
hjlf

Answer:

The number of moles of oxygen present in the crew cabin at any given time is 615.309 moles

Explanation:

The given parameters are;

Volume of the crew cabin = 74,000 L

Pressure of the crew cabin = 1.00 atm

Percentage of nitrogen in the mixture of gases in the cabin = 80%

Percentage of oxygen in the mixture of gases in the cabin = 20%

Temperature of the cabin = 20°C = 293.15 K

Therefore, volume of oxygen in the crew cabin = 20% of 74,000 L

Hence, volume of oxygen in the crew cabin = \frac{20}{100} \times 74,000 \, L = 14,800 \, L

From the universal gas equation, we have;

n = \frac{P \times V}{R  \times  T}

Where:

n = Number of moles  of oxygen

P = Pressure = 1.00 atm

V = Volume of oxygen = 14,800 L

T = Temperature = 293.15 K

R = Universal Gas Constant = 0.08205 L·atm/(mol·K)

Plugging in the values, we have;

n = \frac{1 \times 14,800 }{0.08205   \times  293.15 } = 615.309 \, moles

The number of moles of oxygen present in the crew cabin at any given time = 615.309 moles.

3 0
3 years ago
Magnesium and nitrogen react to form magnesium nitrate. Which of the following expressions represents this chemical reaction?
Leona [35]
Magnesium + Nitrogen ➡ Magnesium Nitrate
3 0
3 years ago
C2H2 + 2H2 → C2H6<br> How many moles of hydrogen are needed to produce 13.78 mol of ethane?
Scilla [17]

Answer:

27.56 moles

Explanation:

8 0
3 years ago
The gas in a cylinder has a volume of 7 liters at a pressure of 107kPa. The pressure of the gas is increased to 208kPa. Assuming
VashaNatasha [74]
By Boyles Law (P1V1=P2V2), substituting values in and solving for V2, we find that the new volume is 3.6 L<span />
6 0
3 years ago
Compare an ionic and a molecular compound in terms of how each is formed
GREYUIT [131]

Answer:

Molecular compounds are pure substances formed when atoms are linked together by sharing of electrons while ionic compounds are formed due to the transfer of electrons.

Molecular compounds are made due to covalent bonding while ionic compounds are made due to ionic bonding.

Explanation:

8 0
3 years ago
Other questions:
  • Which compound could be added to hydroiodic acid to neutralize its acidic properties ?
    10·2 answers
  • Which of these properties is TRUE for water?
    6·2 answers
  • What are is the pH range of phenolphthalein and methyl orange​
    8·1 answer
  • velocity and time information for a leftward moving car are shown. t = 4.0s v= 4.0 m/s. t = 0.0 v=20.0 m/s. what is the magnitud
    8·1 answer
  • Describe how surface area affects the rate of a reaction.
    15·2 answers
  • El butano, C4H10, se quema en presencia de oxígeno gas, O2, y se produce dióxido de carbono, CO2, y agua. ¿Cuántos kg de CO2 se
    7·1 answer
  • How many Liters of I2 are produced when 241.6 grams of KI are reacted with excess CuBr2?
    11·1 answer
  • 35. 124.31 g of silver nitrate reacts with 52.89 g of sodium chloride.
    14·1 answer
  • What is the difference between cellular respiration and breathing?​
    5·1 answer
  • The satellite photograph shows an area in Alaska after a fire occurred. Which statement best describes the most likely effect th
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!