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AnnZ [28]
3 years ago
15

Can someone help me please

Chemistry
1 answer:
mr_godi [17]3 years ago
4 0

Answer:

health issues and physical encounters

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Using the data: C2H4(g), = +51.9 kJ mol-1, S° = 219.8 J mol-1 K-1 CO2(g), = ‑394 kJ mol-1, S° = 213.6 J mol-1 K-1 H2O(l), = ‑286
ra1l [238]

Answer:

The correct answer is 1332 KJ.

Explanation:

Based on the given information,  

ΔH°f of C2H4 is 51.9 KJ/mol, ΔH°O2 is 0.0 KJ/mol, ΔH°f of CO2 is -394 KJ/mol, and ΔH°f of H2O is -286 KJ/mol.  

Now the balanced equation is:  

C2H4 (g) + 3O2 (g) ⇔ 2CO2 (g) + 2H2O (l)

ΔH°rxn = 2 × ΔH°f CO2 + 2 × ΔH°fH2O - 1 × ΔH°fC2H4 - 3×ΔH°fO2

ΔH°rxn = 2 (-394) + 2(-286) - 1(51.9) - 3(0)

ΔH°rxn = -1411.9 KJ

Now, the given ΔS°f of C2H4 is 219.8 J/mol.K, ΔS°f of O2 is 205 J/mol.K, ΔS°f of CO2 is 213.6 J/mol.K, and ΔS°f of H2O is 69.96 J/mol.K.  

Now based on the balanced chemical reaction,  

ΔS°rxn = 2 × ΔS°fCO2 + 2 ΔS°fH2O - 1 × ΔS°f C2H4 - 3 ΔS°fO2

ΔS°rxn = 2 (213.6) + 2(69.96) - 1(219.8) -3(205)

ΔS°rxn = -267.68 J/K or -0.26768 KJ/K

T = 25 °C or 298 K

Now putting the values of ΔH, ΔS and T in the equation ΔG = ΔH-TΔS, we get

ΔG = -1411.9 - 298.0 × (-0.2677)

ΔG = -1332 KJ.  

Thus, the maximum work, which can obtained is 1332 kJ.  

6 0
3 years ago
Please put them in order
ziro4ka [17]
Calcium, boron, neon, sulfur
7 0
3 years ago
The CO 2-ion is stabilized by (A resonance. B inductive effects. c heterolysis. D potential energy.
FromTheMoon [43]

Answer: Option (A) is the correct answer.

Explanation:

A phenomenon where delocalization of pi electrons or non-bonding electrons takes place is known as resonance.

For example, in a CO^{2-}_{3} molecule two oxygen atoms contain -1 charge. And, delocalization of pi electrons takes place in order to attain stability.

When in a molecule, there occurs unequal sharing of bonding electrons by a chain of atoms then there occurs a permanent dipole moment. And, this effect is known as inductive effect.

So, basically more difference in electronegativity of the atoms in a molecule tend to cause inductive effect.

In CO^{2-}_{3}, there is not much difference in the electronegativity of carbon and oxygen atom.

Hence, resonance effect predominates inductive effect.

Potential energy is the energy obtained by an object due to its position.

Thus, we can conclude that the CO^{2-}_{3} ion is stabilized by resonance.

4 0
3 years ago
20. What part of an atom exists in orbitals surrounding the nucleus?
LuckyWell [14K]
A)electron orbits around the nuclues
5 0
3 years ago
Hello I need help bro I am not good with science
Aliun [14]

Answer:

Its true

Explanation:

3 0
3 years ago
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