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maks197457 [2]
3 years ago
12

What determines wether or not a reaction is spontaneous answers?

Chemistry
1 answer:
tester [92]3 years ago
7 0
If ΔG  (Gibb's free energy) <0, then a reaction is spontaneous
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He needs an battery to make the simple electromagnet
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3 years ago
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Which electron transition represents a gain of energy
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Answer:

The transition from lower energy level to higher energy level require a gain of energy.

Explanation:

When transition occur from lower energy level to higher energy level require a gain of energy. Electron could not jump unto higher energy level without gaining thew energy.

When electron jump into lower energy level from high energy level it loses the energy.

For example electron when jumped from 2nd to 3rd shell it gain energy and when in return back to 2nd shell from 3rd shell it loses energy.

The process is called excitation and de-excitation.

Excitation:

When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits.

De-excitation:

When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum.

3 0
3 years ago
hat is the percentage of water in the following compound? Answer using three significant figures. Sodium carbonate decahydrate,
BigorU [14]
You need to find the whole molar mass of the compound using the periodic table to add the values. 

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the total molar mass is 106 + 180.2 = 286.2 g/mol

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The amount of solute that can be dissolved in a solvent depends of chemical composition, temperature and pressure.

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3 years ago
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