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timofeeve [1]
3 years ago
9

Briefly explain why there is a constant temperature plateau in the cooling curve

Chemistry
1 answer:
iVinArrow [24]3 years ago
4 0
This plateau is where a phase change occurs. Likely, this cooling curve observes the changing of a liquid into a solid (so that the temperature is quantifiable). As something cools, it’s losing energy to the surroundings; when a phase change occurs, like liquid to solid, energy isn’t lost directly from the atom, but instead the energy maintained by free motion of the atom is used. This lack of motion reduces it into a lattice (all while maintaining a constant internal energy), finalizing the phase change, after which energy is lost directly from the atom again.
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Why is a cis-1,3-disubstituted cyclohexane more stable thanits<br> trans isomer?
anzhelika [568]

Answer:

Explanation has been given below

Explanation:

  • In diaxial conformation of cis-1,3-disubstituted cyclohexane, 4 gauche-butane interactions along with syn-diaxial interaction are present. Hence it readily gets converted to diequitorial conformation where no such gauche-butane interaction is present
  • In two possible conformations of trans-1,3-disubstituted cyclohexane, 2 gauche-butane interactions are present in each of them.
  • Hence cis-1,3-disubstituted cyclohexane exists almost exclusively in diequitorial form. But trans-1,3-disubstituted cyclohexane has no such option.
  • Trans-1,3-disubstituted cyclohexane experiences gauche butane interaction in each of the two conformations.
  • Therefore cis-1,3-disubstituted cyclohexane is more stable than trans conformation

5 0
3 years ago
URGENT!!-- Please help!
blondinia [14]

Moles of gas = 0.369

<h3>Further explanation</h3>

Given

P = 2 atm

V = 5.3 L

T = 350 L

Required

moles of gas

Solution

Ideal gas Law

\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{2\times 5.3}{0.082\times 350}\\\\n=0.369

Avogadro's law : at the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles  

moles of O₂ = 45% x 0.369 = 0.166

moles of Ar = 12% x 0.369 = 0.044

moles of N = 43% x 0.369 = 0.159

3 0
3 years ago
What is the outcome of hotspots? Question 13 options: Formation of islands Constant volcanic eruptions Divergent boundary intera
miss Akunina [59]

Answer:

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6 0
2 years ago
Enzymes are described as catalysts, which means that they __________. View Available Hint(s) Enzymes are described as catalysts,
givi [52]

Answer:

increase the rate of a reaction without being consumed by the reaction

Explanation:

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  • They increase the rate of a chemical reaction without being consumed by the reaction.
  • Enzymes increase the rate of chemical reactions by decreasing the activation energy of the reactants.
  • Catalysts such as enzymes do not affect the free energy change of a chemical reaction (delta G). Therefore, delta G for a catalyzed and non-catalyzed reaction is equal.
6 0
3 years ago
When two nuclei of light elements are forced together at extremely high temperature, which of the following has occurred?
tino4ka555 [31]
 The answer is A. Nuclear fusion
8 0
4 years ago
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