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swat32
3 years ago
10

What is the internal energy of a system? What is the variable for internal energy?

Chemistry
1 answer:
Orlov [11]3 years ago
7 0

Explanation:

Internal energy is the sum of all the energies inside or within a system because molecules of the system will have kinetic, potential, rotational, vibrational etc energies.

Internal energy arises because of random or disordered movement of particles within a system.

Therefore, internal energy of a system is the sum of kinetic and potential energy of all the particles present inside the system.

The variable for internal energy is "U". Also, change in internal energy is represented by \Delta U.


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Calculate the mass percent of HOCH 2CH 2OH in a solution made by dissolving 3.2 g of HOCH 2CH 2OH in 43.5g of water.
grin007 [14]

Answer:

\%m/m=6.85\%

Explanation:

Hello,

In this case, we are asked to compute the by mass percent for the given 3.2 g of ethylene glycol in 43.5 g of water. In such a way, since the by mass percent is computed as follows:

\%m/m=\frac{m_{solute}}{m_{solute}+m_{solvent}} *100\%

Whereas the solute is the ethylene glycol and the solvent the water, therefore we obtain:

\%m/m=\frac{3.2g}{3.2g+43.5g} *100\%\\\\\%m/m=6.85\%

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An electrochemical cell is constructed using two half-cells: Al(s) in Al(NO2)3(aq) and Cu(s) in Cu(NO3)2(aq). The two half cells
wlad13 [49]

Answer:

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Explanation:

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