The ____ of the sun is the interior or center part of this star

The Arrhenius equation shows the relationship between the rate constant k and the temperature T in kelvins and is typically writ

Alex17521 [72]

Answer:

T = 42.08 °C

Explanation:

Using the expression,

$\ln \dfrac{k_{1}}{k_{2}} =-\dfrac{E_{a}}{R} \left (\dfrac{1}{T_1}-\dfrac{1}{T_2} \right )$

Wherem

$k_1\ is\ the\ rate\ constant\ at\ T_1$

$k_2\ is\ the\ rate\ constant\ at\ T_2$

$E_a$ is the activation energy

R is Gas constant having value = 8.314 J / K mol

Thus, given that, $E_a$ = 45.6 kJ/mol = 45600 J/mol (As 1 kJ = 1000 J)

$k_2=2\times k_1$

$k_1=0.0160s^{-1}$

$T_1=30\ ^0C$

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (30 + 273.15) K = 303.15 K

$T_1=303.15\ K$

So,

$\ln \dfrac{k_{1}}{2\times k_{1}} =-\dfrac{45600}{8.314} \left (\dfrac{1}{303.15}-\dfrac{1}{T_2} \right )$

$\ln \dfrac{1}{2} =-\dfrac{45600}{8.314} \left (\dfrac{1}{303.15}-\dfrac{1}{T_2} \right )$

$8.314\ln \left(2\right)=-45600\left(\frac{1}{303.15}-\frac{1}{T_2}\right)$

$8.314\ln \left(2\right)=-150.42058+\frac{45600}{T_2}$

$144.65775 =\frac{45600}{T_2}$

$T_2=\frac{45600}{144.65775}$

$T_2=315.23\ K$

Conversion to °C as:

T(K) = T( °C) + 273.15

So,

315.23 = T( °C) + 273.15

T = 42.08 °C

3 0

4 years ago

The standard free-energy changes for the reactions below are given.Phosphocreatine → creatine + Pi ∆ G'° = –43.0 kJ/molATP → ADP

Anton [14]

Answer:

Gibbs free-energy of the reaction = (–12.5 kJ/mol)

Explanation:

The Gibbs free-energy of a reaction predicts the spontaneity or feasibility of a given chemical reaction.

Given the standard Gibbs free energy changes:

Phosphocreatine → creatine + Pi, ∆G° = –43.0 kJ/mol ...(1)

ATP → ADP + Pi , ∆G° = –30.5 kJ/mol ....(2)

Now to calculate the Gibbs free-energy of the given chemical reaction: Phosphocreatine + ADP → creatine + ATP; the equation (2) is reversed to give:

ADP + Pi → ATP, ∆G° = + 30.5 kJ/mol ...(3)

Now the equation (3) and (1) are added, to give:

Phosphocreatine + ADP + Pi→ creatine + ATP + Pi

⇒ Phosphocreatine + ADP → creatine + ATP

Therefore, to calculate the Gibbs free-energy of the reaction, the standard Gibbs free energy changes of the equations (1) and (3) are added similarly:

Gibbs free-energy of the reaction: ∆G° = (–43.0 kJ/mol) + ( + 30.5 kJ/mol) = (–12.5 kJ/mol)

Therefore, the Gibbs free-energy of the reaction = (–12.5 kJ/mol)

7 0

3 years ago

The job of the ______ is to hold all of the parts of a cell together

Rufina [12.5K]

Answer:

cell membrane

Explanation:

it holds everything together

4 0

3 years ago

Goggle meet - brx - tvyn - oge

svp [43]

Answer: um ok...

Explanation: are u saying to join??

5 0

3 years ago

Which of these statements BEST describes a possible environmental

andriy [413]

Answer:

Option B. is correct

Explanation:

Wind turbines collect the kinetic energy of wind using the turbine blades. The blades turn an electric generator as they are connected to a drive shaft, which in turn produces electricity.

These turbine blades can disrupt flying wildlife including bats and birds.

So,

wind farms can disrupt migrating wildlife.

Option B. is correct.

6 0

3 years ago