*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...
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)?
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...
What is the half-life for the decomposition of NOCl when the concentration of NOCl is 0.15 M? The rate constant for this first-order reaction is 4.75 x 10^-5 s^-1.
The half-life of 82 35Br is 1.471 days. This isotope decays by the emission of a beta particle. a Gaseous HBr is made with Br-82. When the bromine isotope decays, the HBr produces H2 and the bromine decay product. Write a balanced equation for the decay of Br-82. Now, write a balanced equation for the decomposition of H82Br. b If a pure sample of 0.0150 mol of HBr made entirely with Br-82 is placed in an evacuated 1.00-L flask, how...
The rate constant for the first-order decomposition of N_2O_5 in the xeactron2 N_2O_5(g) rightarroe 4 NO_2(g)+O_2(g) is k_I = 3.38 times 10^-5 s^-1 at 25 degree C. What is the half-life of N205? What will be the pressure, initially 500 Torr, after 50 20 min after initiation of the reaction?