A student develops the list shown below that includes laboratory equipment and materials for constructing a voltaic cell.

If a temperature increase from 10.0 ∘C to 22.0 ∘C doubles the rate constant for a reaction, what is the value of the activation

maria [59]

The activation energy barrier is 40.1 kJ·mol⁻¹

Use the Arrhenius equation

$\ln( \frac{k_2 }{k_1 }) = (\frac{E_{a} }{R })(\frac{ 1}{T_1} - \frac{1 }{T_2 })\\$

$\ln( \frac{2k }{k}) = (\frac{E_{a} }{\text{8.314 J} \cdot \text{K}^{-1} \text{mol}^{-1} })(\frac{ 1}{\text{283.15 K}} - \frac{1 }{\text{295.15 K }})\\$

$\ln2 = (\frac{ E_{a} }{\text{8.314 J} \cdot \text{K}^{-1} \text{mol}^{-1}}) \times 1.436 \times10^{-4}\\$

$\ln2 = E_{a} \times 1.727 \times 10^{-5} \text{ mol} \cdot \text{J}^{-1}$

$E_{a} = \frac{\ln2 }{ 1.727 \times10^{-5}\text{ mol} \cdot \text{J}^{-1}}\\$

$E_{a} = \text{40 100 J}\cdot\text{mol}^{-1} = \textbf{40.1 kJ}\cdot \textbf{mol}^{-1}$

3 0

2 years ago

hich term names how clouds form by the collection of water vapor in the atmosphere? evaporation seepage precipitation condensati

SVEN [57.7K]

Condensation

Explanation:

Condensation is a term that describes the collection of water vapor in the atmosphere into clouds.

Condensation is a phase change process that is a key component of the hydrologic cycle in which water moves in different forms in nature.

It occurs when tiny particles suspended in the atmosphere helps to aggregate vapor.
As the hot vapor rises from the surface, the temperature decreases up into the atmosphere.
When it comes in contact with suspended dust or some other particles, it loses its energy and settles on the dust.
When they aggregate, they form the clouds we see.

learn more:

Cloud brainly.com/question/8839455

#learnwithBrainly

5 0

3 years ago

True or False: Chlorine is a diatomic gas<br> True<br> False<br> Rewatch

Mashutka [201]

Answer:
true
Explanation: chlorine is an element that exists in nature as a diatomic molecule.

6 0

2 years ago

4

Masteriza [31]

The answer is D. The teacher describes the plant by saying it has leaves, stems, roots, and fruit. stems are vascular tissue so it can't be C, B, or A.

5 0

2 years ago

Read 2 more answers

4 kmol Methane (CH4) is burned completely with the stoichiometric amount of air during a steady-flow combustion process. If both

Svetach [21]

Answer:

Heat transfer = 3564 Jolues

The same value

Explanation:

The heat of combustion is the heat released per 1 mole of substunce experimenting the combustion at standard conditions of pressure and temperature ( 1 atm, 298 K):

Qtransfer = - mol x ΔHºc Qtransfer

So look up in appropiate reference table ΔHºc and solve the problem:

ΔHºc = - 891 kJ/mol

Qtransfer = - (4 x 10³ mol x -891 kJ/mol ) = 3564 J

if the combustion were achieved with 100 % excess air, the result will still be the same. As long as the standard conditions are maintained, the heat of combustion remains constant. In fact in many cases the combustion is performed under excess oxygen to ensure complete combustion.

7 0

2 years ago