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3 years ago

Write the full Nernst Equation (i.e. not just at 298K) and define each term:

Chemistry

1 answer:

alex41 [277]3 years ago

5 0

Answer :

The Nernst equation :

$E_{cell}=E^o_{cell}-\frac{2.303RT}{nF}\log \frac{[Anode]}{[Cathode]}$

where,

$E^0$ = standard cell potential

n = number of electrons in oxidation-reduction reaction

F = Faraday constant = 96500 C

R= gas constant = 8.314 J/Kmol

T = temperature

[Anode] = anodic ion concentration

[Cathode] = cathodic ion concentration

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The density of helium in a balloon is 1.18 g/L. If a

marissa [1.9K]

There is 3.58 He in the balloon.

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3 years ago

A car with a mass of 1360 kg accelerate from 120 m/s 2 to 520 m / s in 8 seconds.what is the acceletation of the car

Keith_Richards [23]

The mass isnt relevant
520 - 120 = 400
400 / 8 = 50
50ms^-2

7 0

3 years ago

A. Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest reaction rate, a

deff fn [24]

Answer:

A) $E_{a} = 350KJ/mol$ , $E_{a} = 50KJ/mol$ , $E_{a} = 50KJ/mol$

A = 1.5× $10^{-7}s^{-1}$ , A = 1.9× $10^{-7} s^{-1}$ , A=1.5× $10^{-7} s^{-1}$

B) 4.469

Explanation:

From Arrhenius equation

$K=Ae^{\frac{E_{a} }{RT} }$

where; K = Rate of constant

A = Pre exponetial factor

$E_{a}$ = Activation Energy

R = Universal constant

T = Temperature in Kelvin

Given parameters:

$E_{a} =165KJ/mol$

$T_{1}=505K$

$T_{2}=525K$

$R=8.314JK^{-1}mol^{-1}$

taking logarithm on both sides of the equation we have;

$InK=InA-\frac{E_{a} }{RT}$

since we have the rate of two different temperature the equation can be derived as:

$In(\frac{K_{2} }{K_{1} } )=\frac{E_{a} }{R}(\frac{1}{T_{1} } -\frac{1}{T_{2} } )$

$In(\frac{K_{2} }{K_{1} } )=\frac{165000J/mol}{8.314JK^{-1}mol^{-1} }.(\frac{1}{505} -\frac{1}{525} )$

$In(\frac{K_{2} }{K_{1} } )$ = 19846.04×7.544× $10^{-5}$ = 1.497

$\frac{K_{2} }{K_{1} }$ = $e^{1.497}$ = 4.469

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3 years ago

What factors determine how water cycles on earth?

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The factor that determine how water cycles on earth is the forms that water is found in[solid, liquid and gas].

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3 years ago

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Answer:

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2 years ago