2 votes
Accepted

How does steam distillation work to extract a substance from a mixture, below its boiling point?

With comparable boiling points like for water and benzene mixture at constant pressure, neither of liquids boils when sum of partial pressures of their vapors overcomes air pressure. They are just ...
Poutnik's user avatar
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1 vote

Why does Raman Activity Require Anisotropic Polarizability?

The Raman effect involves scattering of a photon with a change in energy due to vibrations or rotations of the molecule. It is changes in the polarisability ellipsoid (either size, shape or ...
porphyrin's user avatar
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1 vote

How does steam distillation work to extract a substance from a mixture, below its boiling point?

At a given temperature isolated, pure substances have an intrinsic vapor pressure. When 2 or more pure substances are mixed that do not dissolve in each other [ie. each is "isolated"] each ...
jimchmst's user avatar
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1 vote
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Calculation of formation heat given molar heat capacities and reaction enthalpy

You can apply the Hess law (Wikipedia, Libretexts), mere saying the change of enthalpy (or more generally any state variable) depends only on the starting and ending state, not on the path how the end ...
Poutnik's user avatar
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1 vote
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Reaction kinetics exercise for hydrogen iodide synthesis

A mistake must have happened in your calculations, because, when I do them, I obtain : ln$k_1 = - 8.314$; ln$k_2 = - 0.100$; ln$k_1$ - ln$k_2$ = $-8.314 + 0.100 = -8.214$ $\frac{1}{T_1} - \frac{1}{T_2}...
Maurice's user avatar
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1 vote

Why does the reaction "pause" when the battery is not connected to a circuit? (or does it?)

In a battery, the zinc and manganese reagents are kept separate, and so the electrons can only flow when both parts of the battery are connected via an electric circuit. If you take a look at the ...
isolated matrix's user avatar
1 vote
Accepted

Why does the reaction "pause" when the battery is not connected to a circuit? (or does it?)

If no wire is joining the zinc plate and the $\ce{MnO2}$ plate, the whole setup would not be a cell or a battery. It wouldn't produce any anode or any cathode. The whole setup would simply be a ...
Maurice's user avatar
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