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Soaring Crane
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1) Methanol can be produced by the following reaction:
CO (g) + 2H2 (g) --> CH30H (g)
How is the rate of disappearance of hydrogen gas related to the rate of appearance of methanol?
-delta/delta t = ?
CO (g) + 2H2 (g) --> CH30H (g)
How is the rate of disappearance of hydrogen gas related to the rate of appearance of methanol?
-delta
/delta t = ?
a. + delta /delta t
b. + 1delta[CH3OH]/2delta t
c. + 2 delta [CH3OH]/delta t
d. none of the above
Is it d because the rates are supposed to be determined experimentally?
2) The first order isomerization of cyclopropane -> propene has a rate constant of 0.00026 1/sec at 435 Celsius with an activation energy of 264 kJ/mol. What is the temperature at which the rate constant is 0.00447 1/sec? Calculate your answer in kelvins.
k2 = 0.00447 1/s
k1 = 0.00026 1/s
T1 = 435 C = 708.15 K
E_a = 264 kJ/mol = 2640 J/mol
ln (k2/k1) = (-E_a/R)*[(1-T2) - (1/T1)]?
1/T2 = [-ln (k2/k1)/(-E_a/R)] + (1/T1)
1/T2 = -ln(0.00447/.00026)/[-2640 J/mol/(8.314)] + (1/708.15 K)
=0.0096133567 + (1/708.15 K) = 0.011025
1/0.011025 = 90.69 K = 90.7 K?
Is the correct final answer and method?
Thank you.
b. + 1delta[CH3OH]/2delta t
c. + 2 delta [CH3OH]/delta t
d. none of the above
Is it d because the rates are supposed to be determined experimentally?
2) The first order isomerization of cyclopropane -> propene has a rate constant of 0.00026 1/sec at 435 Celsius with an activation energy of 264 kJ/mol. What is the temperature at which the rate constant is 0.00447 1/sec? Calculate your answer in kelvins.
k2 = 0.00447 1/s
k1 = 0.00026 1/s
T1 = 435 C = 708.15 K
E_a = 264 kJ/mol = 2640 J/mol
ln (k2/k1) = (-E_a/R)*[(1-T2) - (1/T1)]?
1/T2 = [-ln (k2/k1)/(-E_a/R)] + (1/T1)
1/T2 = -ln(0.00447/.00026)/[-2640 J/mol/(8.314)] + (1/708.15 K)
=0.0096133567 + (1/708.15 K) = 0.011025
1/0.011025 = 90.69 K = 90.7 K?
Is the correct final answer and method?
Thank you.
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