In terms of molecular motion, why does an increase in pressure lead to an increased solubility of a gas?

1 answer:

7 0

We imagine a piston cylinder and a solution of gas and water. Molecules are in constant random motion and some of the gas particles are in the vapor phase while some in the liquid phase. At a specific volume, molecules move freely. However, when the piston is moved down, increasing the pressure, some of the molecules in the vapor are pushed down to the liquid phase in order maintain equilibrium thus increasing solubility

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There are 5.69*10²⁴ molecules in 9.45 moles.

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The mole is defined as the amount of matter that particles have, that is, atoms and elementary entities.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and represents a quantity without an associated physical dimension. Avogadro's number applies to any substance.

Then the following rule of three can be applied: if 1 mole contains 6.023 * 10²³ molecules, 9.45 moles, how many molecules will it have?

$amount of molecules=\frac{9.45 moles*6.023*10^{23}molecules }{1 mole}$

Solving:

amount of molecules= 5.69*10²⁴⁴ molecules

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