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Harrizon [31]
3 years ago
10

Which change of state is shown in the model?

Chemistry
2 answers:
nata0808 [166]3 years ago
7 0

\boxed{\text{Deposition}} is shown in the given model.

Further Explanation:

Condensation

The process by which a substance in its gaseous or vapor form is transformed into its liquid form is termed as condensation. It is just the reverse of evaporation. The random motion of gas particles is reduced and they come together to form a liquid. This is done by altering the temperature and pressure of the substance.

Deposition

The phase transition due to which a gas or vapor transforms directly into solid by not going through the liquid phase is termed as deposition. It is a thermodynamic process. This process occurs when water vapors release enough of its thermal energy and get converted into solids directly without passing through the liquid state. It is the opposite of what is done in the sublimation process and is therefore known as desublimation.

Boiling

The phase transition due to which gaseous or vapor state is formed from the liquid state is known as boiling. This takes place when a substance in its liquid state is heated to its boiling point.

Freezing

It is a process in which the substance gets converted from its liquid state to a solid state. It is just the reverse of melting. In this phase transition, heat is released from the substance and the liquid particles come closer to form solid. The formation of ice is an example of freezing.

In the given model, gaseous or vapor state is transformed into a solid state and this phase change occurs in case of deposition. Therefore deposition is shown in the given model.

Learn more:

  1. Identify the phase change in which crystal lattice is formed: brainly.com/question/1503216
  2. The main purpose of conducting experiments: brainly.com/question/5096428  

Answer details:

Grade: Senior School

Chapter: Phase transition

Subject: Chemistry

Keywords: deposition, freezing, boiling, solid, liquid, vapor, condensation, desublimation, thermodynamic process.

Romashka [77]3 years ago
5 0
I believe the change of state shown in the model is deposition. 
Deposition is a process in which gases change phase and turns directly in solids without passing through the liquid phase. It is the opposite of sublimation.
One of the major difference between gases and solids is the distance between molecules; in gases the inter molecular spaces are large, while in solid they are very small, making solids be the most dense, with closely packed molecules. This is evident in the diagram, the phase changed from gases to solids. 
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It would take 198 mol to produce
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Calculate ΔrG∘ at 298 K for the following reactions.CO(g)+H2O(g)→H2(g)+CO2(g)2-Predict the effect on ΔrG∘ of lowering the temper
KonstantinChe [14]

Answer:

1) ΔG°r(298 K) = - 28.619 KJ/mol

2) ΔG°r will decrease with decreasing temperature

Explanation:

  • CO(g) + H2O(g) → H2(g) + CO2(g)

1) ΔG°r = ∑νiΔG°f,i

⇒ ΔG°r(298 K) = ΔG°CO2(g) + ΔG°H2(g) - ΔG°H2O(g) - ΔG°CO(g)

from literature, T = 298 K:

∴ ΔG°CO2(g) = - 394.359 KJ/mol

∴ ΔG°CO(g) = - 137.152 KJ/mol

∴ ΔG°H2(g) = 0 KJ/mol........pure substance

∴ ΔG°H2O(g) = - 228.588 KJ/mol

⇒ ΔG°r(298 K) = - 394.359 KJ/mol + 0 KJ/mol - ( - 228.588 KJ/mol ) - ( - 137.152 KJ7mol )

⇒ ΔG°r(298 K) = - 28.619 KJ/mol

2) K = e∧(-ΔG°/RT)

∴ R = 8.314 E-3 KJ/K.mol

∴ T = 298 K

⇒ K = e∧(-28.619/(8.314 E-3)(298) = 9.624 E-6

⇒ ΔG°r = - RTLnK

If T (↓) ⇒ ΔG°r (↓)

assuming T = 200 K

⇒ ΔG°r(200 K) = - (8.314 E-3)(200)Ln(9.624E-3)

⇒ ΔG°r (200K) = - 19.207 KJ/mol < ΔG°r(298 K) = - 28.619 KJ/mol

6 0
3 years ago
An unknown compound contains only carbon, hydrogen, nitrogen, and oxygen. Complete combustion of a 2.77 g sample of the compound
alisha [4.7K]

The molecular formula of the unknown compound is determined as  C₉H₁₁NO₂.

<h3>Molecular formula of the compound</h3>

The molecular formula is calculated as follows;

CHNO  +  O₂ ------------> CO₂  + H₂O

Mass of carbon, C:  = (6.64 x 12)/44 = 1.81 g in 2.77 g sample

Mass of hydrogen, H: = (1.67 x 2)/18 = 0.186 g in 2.77 g sample

Mass of Nitrogen, N: = (2.77 x 0.143)/1.69 = 0.234 g

Mass of oxygen, O:  = 2.77 g - 1.81 g - 0.186 g - 0.234 g = 0.54 g

<h3>molar ratio of the elements: </h3>

C = 1.81 g = 0.15 mol

H = 0.186 g = 0.186 mol

N = 0.234 g = 0.017 mol

O = 0.54 g = 0.0337 mol

divide through with the smallest number of moles (0.017 mol);

C = 9

H = 11

N = 1

O = 2

Molecular formula = C₉H₁₁NO₂

Check the molar mass of the compound = (9 x 12) + (11 x 1) + (14) + (2 x 16) = 165 g/mol

Thus, the molecular formula of the unknown compound is determined as  C₉H₁₁NO₂.

Learn more about molecular mass here: brainly.com/question/21334167

#SPJ1

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