A first order reaction has a rate constant of 0.803 sec-1 at 31.7 oC. If the activation energy is 60.7 kJ, calculate the temperature in oC at which the rate constant is 0.633 sec-1.

The gas phase decomposition of hydrogen iodide at 700 K HI(g)- →½ H2(g) + ½ I2(g) is second order in HI. In one experiment, when the initial concentration of HI was 2.23 M, the concentration of HI dropped to 0.656 M after 591 seconds had passed. Based on these data, the rate constant for the reaction is M-1 s-1.

Sucrose (C12H22O11) hydrolyzes into glucose and fructose. The hydrolysis is a first-order reaction. The half-life for the hydrolysis of sucrose is 64.2 min at 25°C. How many grams of sucrose in 1.25 L of a 0.217 M  solution are hydrolyzed in 1.73 hours?

The decomposition of N2O5 to NO2 and O2 is first order with respect to the reactant N2O5 and first order overall.  The rate constant for the reaction at 70.oC is 6.82x10-3 s-1.  The reaction is started with 0.300 mol of N2O5 in a 0.500L container. How many minutes will it take for the concentration of N2O5 to drop to 0.145M?

A certain 2nd order reaction is known to proceed by a two-step process such that k1<<k2.  The forward reaction has an activation energy of 48 kJ/mole and the reverse reaction has an activation energy of 62 kJ/mole.  Sketch the energy diagram for the reaction.

The first-order rate constant for the decomposition of C2H5Cl, C2H5Cl(g)  C2H4(g) + HCl(g) at 27 oC is k = 7.27e-30 s-1. Suppose we start with 0.0845 mol of C2H5Cl in a volume of 4.9 L. How many moles of C2H5Cl will remain after 1.24e+27 min?

The thermal decomposition of sulfuryl chloride to sulfur dioxide and chlorineSOCl(g)  SO(g) + Cl(g)is a first order reaction with a half-life of 2.3010 seconds. For this reaction what is the numerical value of k, the rate constant, in s?

The rate constant for a first-order reaction is 2.66 × 10‒2 s‒1 at 298 K. What is the rate constant at 350. K if the activation energy for the reaction is 52.9 kJ/mol?

The decomposition of sulfuryl chloride (SO2CI2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 10-2 s-1. (a) If we begin with an initial SO2Cl2 pressure of 335 torr, what is the pressure of this substance after 61 s? 22.40 is wrong. Incorrect: Your answer is incorrect. torr (b) At what time will the pressure of SO2Cl2 decline to one eighth its initial value? 26.20 is wrong Incorrect: Your answer is incorrect. s By what factor will the pressure of sulfuryl chloride decrease after 8 half lives? Note: The answer wants this value: (335 torr)/value = final pressure after decay 128 is wrong. Incorrect: Your answer is incorrect. value

The rate constants for the decomposition of dinitrogen pentoxide are3.7x10-5 s-1 at 25 oC and 1.7x10-3 s-1 at 55 oC.2 N2O5 (g) → 4 NO2 (g) + O2 (g) -Determine the activation energy for this reaction in KJ/mol.