the rate constant of a first-order rxn is 3.25x10 -4 s -1 at 350 drees celcius.
ID: 846000 • Letter: T
Question
the rate constant of a first-order rxn is 3.25x10-4s-1 at 350 drees celcius. if the activation energy is 129kJ/mol, calculate the temperature at which its rate constant is 9.15x10-4s-1
___________degrees celcius
(sperate question)
the rate constant for the gaseous rxn
H2 (g)+ I2 (g) ----->2HI (g)
is 2.42x10-2/(M .s) at 400 celcius. intial;ly an equimolar sample H2 and I2 is placed in a vessel at 400 celcius and the toatl pressure is 1670 mmHg.
what is the intial rate (M . min) of formation HI?
__________(M/min)
what are the rate of formation of HI and the concentration of HI (in molarity) after 15.4 min?
rate of formation=__________(M/min)
[HI]=______M
Explanation / Answer
log(K2/K1) = Ea/2.303R[1/T1- 1/T2]
log(9.15*10^-4/ 3.25*1-0^-4) = 129*10^3/2.303*8.314 [1/623 - 1/T2]
T2 = 650.02 K or 377.02 0C
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