Question

The first order rate constant for a reaction at 790
^{o}C is 4.05e-03 s^{-1}. If the activation energy
for the reaction is 255 kJ/mol, what is the rate constant at 890
^{o}C?

k = s^{-1}

Answer #1

A certain first order reaction has k = 6.2 × 10‒5 s‒1 at 35 oC
and an activation energy of 108 kJ/mole. What is the numerical
value of the specific rate constant, k, at 45 oC?
A certain first order reaction has k = 9.3 × 10‒5 M‒1 s‒1 at 100
oC and k = 1.0 × 10‒3 M‒1 s‒1 at 130 oC. What is the numerical
value of the activation energy in kJ/mol for this reaction?

If a first order reaction has a rate constant of 4.15 X
10-2 s-1 at a temperature of
24.5oC, what would the value of k be if the reaction
temperature was changed to 52oC given that the
activation energy is 67.8 kJ/mol?

The rate constant of a first-order reaction is 3.20 × 10−4 s−1
at 350.°C. If the activation energy is 135 kJ/mol, calculate the
temperature at which its rate constant is 9.15 × 10−4 s−1.

1) A first order reaction has an activation energy of 66.6
kJ/mol and a frequency factor (Arrhenius constant) of 8.78 x
1010 sec -1. Calculate the rate constant at
19 oC. Use 4 decimal places for your answer.
2) A first order reaction has a rate constant of 0.988 at 25
oC and 9.6 at 33 oC. Calculate the value of
the activation energy in KILOJOULES (enter answer to one decimal
place)

-(a) A certain first-order reaction has a rate
constant of 2.75 × 10–2 s–1 at 20 °C. What is
the value of k at 60 °C if Ea
= 75.5 kJ/mol?
(b) Another first-order reaction also has a
rate constant of 2.75 × 10–2 s–1 at 20 °C.
What is the value of k at 60 °C if
Ea = 125 kJ/mol?
(c) What assumptions do you need to make in
order to calculate answers for parts (a) and (b)?

The rate constant of a first-order reaction is 0.0032 x
10-4 L/mol *s at 640 K. If the activation energy is
176,406J/mol, calculate the temperature at which is rate constant
is 0.0039 x10 -4 L/mol*s.
Show your work please.

For the reaction A + B C, the rate constant at 215 oC
is 5.0 x 10-3 and the rate constant at 452o C
is 1.2 x 10-1.
a) What is the activation energy in kJ/mol?
b) What is the rate constant at 100o C.

The first-order rate constant for the reaction of methyl
chloride (CH3Cl) with water to produce methanol (CH3OH) and
hydrochloric acid (HCl) is 3.32 × 10−10 s−1 at 25°C. Calculate the
rate constant at 47.5°C if the activation energy is 116 kJ/mol.

For the reaction A + B-> C, the rate constant at 315
oC is 5.0 x 10-3 and the rate constant at
652o C is 1.2 x 10-1.
a) What is the activation energy in kJ/mol?
b) What is the rate constant at 100o C
Please show work.

Part A A certain first-order reaction has a rate constant of
2.40×10−2 s−1 at 21 ∘C. What is the value of k at 61 ∘C if Ea =
90.0 kJ/mol ? Express your answer using two significant figures. k
= s−1 SubmitMy AnswersGive Up
Part B A certain first-order reaction has a rate constant of
2.40×10−2 s−1 at 21 ∘C. What is the value of k at 61 ∘C if Ea = 104
kJ/mol ? Express your answer using two...

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