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Andrew [12]
3 years ago
8

How are objects charged by friction

Chemistry
1 answer:
mote1985 [20]3 years ago
4 0

Answer:

When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged

Explanation:

thank me later

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The standard cell potential Ec for the reduction of silver ions with elemental copper is 0.46V at 25 degrees celsius. calculate
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Solution :

The balanced cell reaction will be,  

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Here, magnesium (Cu) undergoes oxidation by loss of electrons, thus act as anode. silver (Ag) undergoes reduction by gain of electrons and thus act as cathode.

The half oxidation-reduction reaction will be :

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Now we have to calculate the Gibbs free energy.

Formula used :

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where,

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Now put all the given values in this formula, we get the Gibbs free energy.

\Delta G^o=-(2\times 96500\times 0.46)=-88780J/mole

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