QUESTION 6 The half-life of a first-order reaction at 25,00 C is 2.00 days. What is...
At 380 C, the half-life period for the first order decomposition of HO, is 360 min. The energy of activation of the reaction is 200 kJ mor. Calculate the time required c) for 75% decomposition at 450°C. (10 Marks) A mixture of diatomic nitrogen and diatomic hydrogen gas in a 1:3 molar ratio was passed over a catalyst to form ammonia at 450 C. At pressure of 10.13 atm, there was 2.04% by volume of ammonia gas formed. Determine the...
Perform Rate Calculations Using Half Life Question The first order reaction 3A 2BChas rate constant 0.538 s1, If the initial concentration of A is 0.867 mol L-1, what is the half-life of the reaction, in seconds? Remember to use correct significant figures in your answer. Provide your answer below: FEEDBACKMORE INSTRUCTION SUBMIT Content attribution
A first order reaction has 2.81 s half-life at 298 K and 0.313 s half-life at 318 K. Using the Arrhenius expression, identify the correct activation energy for this reaction? (R = 0.00832 kJ/mol-K) O 1. 10.5 kJ/mol 2.86.3 kJ/mol 3. 105 kJ/mol 4.501 kJ/mol
A.For the following first order reaction, the half-life is 28.3 and the [A]0 = 1.36. Calculate the rate constant.2A -> 3BB.Consider the following reaction. aA + bB -> cCwhose first and second half-lives are 38.2 and 19.1 minutes respectively. If the rate constant is equal to 0.2148 and [A]0 = 16.41, calculate the [A] at t 5.87 minutes.C.A researcher raises the temperature from 46.4 to 66 °C and finds that the rate of the reaction doubles. What was the activation energy (in...
In a first-order reaction at 300 K, the half-life is 2.50 x 104 seconds and the activation energy is 103.3 kJ/mol. What is the rate constant at 350 K? 4.78 s-1 2.79 x 10-5 s-1 6.38 x 1016 s-1 7.47 x 10-8 s-1 1.03 x 10-2 s-1
A first order reaction has a half-life of 196 seconds at 25oC. How long (in minutes) does it take for the concentration of the reactant to drop to 3.125% of the original concentration? (it's not 16.34) The rate constant of a chemical reaction increased from 0.197 s-1 to 3.24 s-1 after raising the temperature from 20.0 oC to 60.0 oC. What is the activation energy (in kJ/mol) for this reaction? (Hint: Think about what R value to use and what...
(a) (4 marks) The reaction A (aq) → B (aq) is a first order reaction with respect to A (aq). The concentration of A (aq) after 100.0 seconds of reaction is 0.913 M and the concentration of A (aq) after 400.0 seconds of reaction is 0.759 M. What will be the concentration of A (aq) after 829.9 seconds of reaction? (b) (4 marks) The reaction A (aq) → B (aq) + C (aq) is a first order reaction with respect...
+ Half-life for First and Second Order Reactions 11 of 11 The half-life of a reaction, t1/2, is the time it takes for the reactant concentration A to decrease by half. For example, after one half-Me the concentration falls from the initial concentration (Alo to A\o/2, after a second half-life to Alo/4 after a third half-life to A./8, and so on. on Review Constants Periodic Table 11/25 For a second-order reaction, the half-life depends on the rate constant and the...
Calculate the half life, t½ (in min) for the first order reaction, A → B, if the reaction is 29.4% complete in 19.5 minutes. Report your answer to THREE significant figures.
The first-order decomposition of hydrogen peroxide has a half-life of 10.7 h at 20°C. a. What is the rate constant (expressed in hr−1) for this reaction? _____________ Write answer to three significant figures and NO UNITS in answer. b. If you started with a solution that was 7.5 × 10−3 M H2O2, what would be the concentration of H2O2 after 3.3 h? __________