Given the reaction is first order.
So half life,t1/2=0.693/k
Where
K=rate constant=4.90*10^-4 min^-1
So t1/2=0.693/k =1414 min
The uncoiling of DNA is a first order reaction. Its activation energy is 420 kJ at...
6. The uncoiling of deoxyribonucleic acid (DNA) is a first order reaction with an activation energy of 420. kJ/mol. If the rate constant is 2.94 x 10-25-1 at 37°C, what is the rate constant when the temperature is decreased to 25°C?
. (a) If a first-order reaction has an activation energy of 104.6 kJ/mol and, in the equation k = k0 exp (-Ea/RT), k0 has a value of 5×1013/s, at what temperature will the reaction have a half-life of (i) 1 h; (ii) 1 day? [Note: the value of R is 8.314 kJ/kmol·K.] (b) If the sterilization of a biomaterial was heating at 121°C for 5 min, it could only be heated at 111°C due to the failure of the heating...
Could I get help on part B 3a. A certain first-order reaction is 35.5% complete in 4.90 minutes at 25°C. What is its rate constant e-kt K,=0.0895 min 64.5% min - 10 0.645 1.00 to = 8.95 x 100% 4.905 -0.0895 min 3b. If a first-order reaction has an activation energy of 104,600 J/mole and an A value of 5 x 10 sec !, at what temperature will the reaction have a half-life of 1 min? What about 30 days?
Consider an elementary first order reaction found to have an activation energy (EA) of 250 kJ/mole and a pre-exponential (A) of 1.7 x 1014 s–1. (a) Determine the rate constant at T = 750°C. (b) At what temperature will the reaction be three times as fast as at 750°C? (c) What fraction of the reaction will be completed in a batch reactor at 300°C over a period of 10 minutes?
3) The rate constant of a first order reaction is 2.6 x 10+ s' at 255 °C. If the activation energy is 99.9 KJ/mol, calculate the temperature at which its rate constant is 4.8 x 104 sl.
1] The activation energy of an uncatalyzed reaction is 99 kJ/mol . The addition of a catalyst lowers the activation energy to 56 kJ/mol . a] Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 27 ∘C? Express the ratio to two significant digits. b] Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at 139 ∘C?...
2. The activation energy for the following first-order reaction is 102 kJ/mol. N2O(g) → 2NO(g) + 1/2O2(g) The value of the rate constant (k) is 1.35 x 10-s-1 at 35°C. What is the value of k at 20°C? (6 points)
The rate constant of a first-order reaction is 3.90 times 10^-4 s^-1 at 350. degreeC. If the activation energy is 131 kJ/mol, calculate the temperature at which its rate constant is 7.30 times 10^-4 s^-1. degreeC
A certain first-order reaction has a rate constant of 1.65 min-1 at 20°C. What is the value of the rate constant at 60°C if the activation energy is 75.5 kJ/mol? The rate constant is 105 times bigger at 300 K than at 200K. Explain why reaction rate increases with temperature? At 227°C, the reaction: SO2Cl2(g) SO2(g) + Cl2(g), has an equilibrium constant of KC = 2.99×10-7. If a reaction mixture initially contains 0.175 M SO2Cl2, what is the equilibrium concentration...
The enthalpy of activation of a first order reaction is 111 kJ/mole. The rate constant at 60degreeC is 2.02 x 10^4 s^-1. What is the rate constant (s^-1) at 45degreeC?