6. The uncoiling of deoxyribonucleic acid (DNA) is a first order reaction with an activation energy...
The uncoiling of DNA is a first order reaction. Its activation energy is 420 kJ at 37degree C, the rate constant is 4.90 times 10^-4 min^-1. What is the half-life of the uncoiling if the organism has a temperature of 37degree C (104degreeF).
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.
The following gas-phase reaction follows first-order kinetics. CIO2F======> CIOF+O The activation energy of this reaction is 186 kJ/mol. The value of k at 322°C is 6.76 x 10-4 S-1 . a. What would be the value of k for this reaction at room temperature, 25°C? k = _____ S-1 b. At what temperature would this reaction have a k value of 9.50 x 10-2 S-1 ? Temperature = ______ oC
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)
12. 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 52.1°C if the activation energy is 116 kJ/mol. _____ ×10^____ s−1 (Enter your answer in scientific notation.) 14. The rate constant of a first-order reaction is 2.75 × 10−4 s−1 at 350.°C. If the activation energy is 101 kJ/mol, calculate the temperature at which its rate constant...
Cyclopropane isomerizes to propylene according to a first order reaction: cyclopropane → propylene The activation energy is Ea=272 kJ/mol. At 773K, the reaction rate constant is 6.1 x 10-4 5-1 a. Calculate the pre-exponential factor, A, for this reaction b. Calculate the rate constant for this reaction at 298K.
d listing r. (Individ For a particular first-order reaction, it takes 24 minutes for the concentration of the reactant to decrease to 25% of its initial value, what is the value for rate constant (in S-1) for the reaction? A) 2.0-104 s-1 B)9.6 x 10-4 s-1 C) 1.2 × 10-2 s-1 D)5.8 102s-1 12. In the first order reaction A → products, [A1-0.400 M initially and 0250 M after 15.0 mun, what willl after 175 min? e A) 1.67-10-3 M...
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?
6. (a) The rate constant for the first-order decomposition of N2Os in the reaction, 2 N2Os(g)-4 NO(g)+0.(g), k-3x10-s at 25°C. What is the half-life of N20s? What will be the pressure, initially 500 bar, at 10 min after initiation of the reaction? (b) Knowing the activation energy of the above reaction is 100 kJ mor', calculate the required reaction temperature at which the reaction rate is doubled. (c) What is the conversion efficiency of N20s at 1 bar and 25...
consider the first order reaction CH3NC=CH3CN given that the frequency factor and activation energy for the reaction are 3.98x10^13s-1 and 161 kj/mol respectively caculate the rate constant at 600c