

*AT (5 marks) At a given temperature, the half-life for the decomposition of a sample of...
The decomposition of dimethyl ether at 504°C is a first order reaction with a half-life of 27.0 min. (CH₃)₂O(g) → CH₄(g) + H₂(g) + CO(g) A reaction vessel is charged with dimethyl ether at an initial pressure of 725 torr, and the reaction is initiated by rapidly heating the vessel to 504°C. Assuming a negligible time lag in beginning the reaction, what will the total gas pressure be in the vessel after 80.0 min? (assume ideal behavior)
17. The decomposition of So,Cl, gas is a first order reaction with a half life of 2.3 x 10 seconds at 600K. If we begin with an initial partial pressure of SO,Cl, of 450 torr, what will be the partial pressure (in torr) of SO,Cl, after 150 hours? (A) 112 (B) 88 (C) 337 (D) 225 (E) 42
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...
the first order decomposition of C3H6 at a given temperature had a half life of 4.576 *10^2 seconds. what is the rate constant for C3H6
How do you calculate the half life for this reaction?
The first-order reaction of decomposition of azomethane is given below: At a certain temperature, the rate constant for this reaction equals 3.05 X 10^-3 s^-1. Calculate the half-life of this reaction (in seconds) at the same temperature.
The first order decomposition of HI(g) at a given temperature has a half-life of 5.453 x 101 seconds. What is the rate constant for HI(g)?
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C the half-life of the reaction is 3.58 ×103 min. If the initial pressure of N2O is 4.30 atm at 730°C, calculate the total gas pressure after one half-life. Assume that the volume remains constant. ___ atm
The decomposition of iodoethane in the gas phase proceeds according to the following equation. C2H5I(g) → C2H4(g) + HI(g) At 660. K, k = 7.2 ✕ 10−4 s−1; at 720. K, k = 1.7 ✕ 10−2 s−1. What is the rate constant for this first-order decomposition at 336°C? If the initial pressure of iodoethane is 880. torr at 245°C, what is the pressure of iodoethane after three half-lives?
Question 6 (18 marks) (a) Given that the rate constant k for the first-order decomposition of compound X is 2.65 x 10-9 s', calculate the percentage of compound X that has decomposed in the first 2250 seconds after the reaction begins. (4 marks) (b) Consider the first order reaction: W2 → 2 Y. If [W2]=0.8 M initially and 0.17 M after 160 seconds, what will [W2] be after 350 seconds? (4 marks) (c) Data for the reaction 3A + 5B...
A decomposition reaction has a half-life that is directly proportional to the initial concentration of the reactant. What is the order of the reaction? Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years. A rock is found to contain 83.4% of the amount of uranium-238 that it contained when it was formed. (The amount that...