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The rate law for the reaction 2A + B →C is –rA= kACA2CBwithkA= 25 (L/mol)2sec. What arekBandkC?

givi [52]

Explanation:

The given reaction equation is as follows.

$2A + B \rightarrow C$

So, rate constants for different reactants and products written as follows.

$\frac{-k_{A}}{\text{stoichiometric coefficient of A}} = \frac{-k_{B}}{\text{stoichiometric coefficient of B}} = \frac{k_{C}}{\text{stoichiometric coefficient of C}}$

As per the reaction equation, the stoichiometric coefficients of reactants and products are as follows.

A = -2

B = -1

C = 1

Therefore,

$\frac{-k_{A}}{\text{stoichiometric coefficient of A}} = \frac{-k_{B}}{\text{stoichiometric coefficient of B}} = \frac{k_{C}}{\text{stoichiometric coefficient of C}}$

$\frac{-k_{A}}{-2} = \frac{-k_{B}}{-1} = \frac{k_{C}}{1}$

$\frac{-k_{A}}{-2} = k_{B} = k_{C}$

Hence, $k_{B} = k_{C}$ = $\frac{25}{2} (L/mol)^{2}$

= 12.5 $(L/mol)^{2}$

Thus, we can conclude that $k_{B}$ and $k_{C}$ are 12.5 $(L/mol)^{2}$ .

5 0

3 years ago

When 38.1 grams of a certain metal at a temperature of 90.0°C is added to 100.0mL of water at a temperature of 17.6°C in a perfe

MakcuM [25]

Answer:

a. qm = 627.3 J

b. qw = 627.3 J

c. C₂ = 227.4 J/kg.°C

Explanation:

a.

Since, the calorimeter is completely insulated. Therefore,

Heat Lost by Metal = Heat Gained by water

qm = qw

qm = m₁C₁ΔT₁

where,

qm = heat lost by metal = ?

m₁ = mass of water = (density)(volume) = (1000 kg/m³)(100 mL)(10⁻⁶ m³/1 mL)

m₁ = 0.1 kg

C₁ = specific heat capacity of water = 4182 J/kg.°C

ΔT₁ = Change in Temperature of Water = 19.1°C - 17.6°C = 1.5°C

Therefore,

qm = (0.1 kg)(4182 J/kg.°C)(1.5°C)

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b.

Since,

qm = qw

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c.

qm = m₂C₂ΔT₂

where,

m₂ = mass of metal = 38.1 g = 0.0381 kg

C₂ = specific heat capacity of metal = ?

ΔT₂ = Change in Temperature of metal = 90°C - 17.6°C = 72.4°C

Therefore,

627.3 J = (0.0381 kg)(C₂)(72.4°C)

(627.3 J)/(0.0381 kg)(72.4°C) = C₂

6 0

3 years ago

What is the voltage of a galvanic cell with 1 silver electrode and 1 gold electrode?

Anestetic [448]

<h3>0.76 V</h3><h3 /><h3>The voltmeter shows that the standard cell potential of a galvanic cell consisting of a SHE and a Zn/Zn2+ couple is E°cell = 0.76 V.</h3><h3 />

7 0

3 years ago

The diagram below shows three stages in the water cycle. Condensation -----> 1----->2 Which statement is correct for the d

Allushta [10]

It is d I think best of luck

4 0

4 years ago

Read 2 more answers

Please help me ill give brainiest to the right answer

Zinaida [17]

A and D make the most sence

6 0

3 years ago

Read 2 more answers