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3 years ago

2. Calculate the standard free energy change

Chemistry

1 answer:

telo118 [61]3 years ago

5 0

Answer:

-36.67 KJ

Explanation:

Now, we ,must find the E°cell as follows;

E°cell= E°cathode - E°anode

E°cathode= -0.25 V

E°anode = - 0.44 V

E°cell= -0.25 -(- 0.44) = 0.19 V

Equation of the reaction; Ni2+ (aq) + Fe(s) → Ni(s) +Fe2+ (aq)

Hence, n=2, there were two electrons transferred.

ΔG=-nFE°cell

ΔG= -(2 * 96,500 * 0.19)

ΔG= -36670 J

ΔG= -36.67 KJ

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We add a 1.20-g sample of dry ice to a 755-mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725mmHg

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Answer:

Total pressure is 1396 mmHg

Explanation:

By:

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When dry ice sublimes, total moles are:

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4 years ago

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Answer:

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C 2.55

N 3.04

O 3.44

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In O-C-O, we have two dipole moments that exactly cancel each other in the linear molecule since the central carbon atom does not have lone pairs of electrons since it has 2 double bonds. Therefore the molecule is nonpolar.

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