5 Marks: 1 The decomposition of formic acid (see below) is measured at several t

Question

5 Marks: 1
The decomposition of formic acid (see below) is measured at several temperatures.

HCOOH(g) ? CO2(g) +H2(g)

The temperature dependence of the first-order rate constant is:

T(K) . . . . k(s-1)

800 ....0.00027 825 ....0.00049 850 ....0.00086 875 ....0.00143 900 ....0.00234 925 ....0.00372 

Calculate the activation energy, in kJ/mol.

Use all data points and do a linear regression using calculator or Excel. Do not pick 2 data points. This is less accurate and assumes all data points are equally qood. Answer: Question6 Marks: 1
Calculate the pre-exponential term (in s -1). Answer: ? 5 Marks: 1
The decomposition of formic acid (see below) is measured at several temperatures.

HCOOH(g) ? CO2(g) +H2(g)

The temperature dependence of the first-order rate constant is:

T(K) . . . . k(s-1)

800 ....0.00027 825 ....0.00049 850 ....0.00086 875 ....0.00143 900 ....0.00234 925 ....0.00372 

Calculate the activation energy, in kJ/mol.

Use all data points and do a linear regression using calculator or Excel. Do not pick 2 data points. This is less accurate and assumes all data points are equally qood. Answer: 5 Marks: 1 Marks: 1
The decomposition of formic acid (see below) is measured at several temperatures.

HCOOH(g) ? CO2(g) +H2(g)

The temperature dependence of the first-order rate constant is:

T(K) . . . . k(s-1)

800 ....0.00027 825 ....0.00049 850 ....0.00086 875 ....0.00143 900 ....0.00234 925 ....0.00372 

Calculate the activation energy, in kJ/mol.

Use all data points and do a linear regression using calculator or Excel. Do not pick 2 data points. This is less accurate and assumes all data points are equally qood. Answer:
The decomposition of formic acid (see below) is measured at several temperatures.

HCOOH(g) ? CO2(g) +H2(g)

The temperature dependence of the first-order rate constant is:

T(K) . . . . k(s-1)

800 ....0.00027 825 ....0.00049 850 ....0.00086 875 ....0.00143 900 ....0.00234 925 ....0.00372 

Calculate the activation energy, in kJ/mol.

Use all data points and do a linear regression using calculator or Excel. Do not pick 2 data points. This is less accurate and assumes all data points are equally qood. Answer: Answer: Question6 Marks: 1
Calculate the pre-exponential term (in s -1). Answer: ? Question6 Marks: 1 Marks: 1
Calculate the pre-exponential term (in s -1). Answer: ?
Calculate the pre-exponential term (in s -1). Answer: ?

Explanation / Answer

ln k= ln k0- ?Ea/(RT)
With y= ln k x= 1/ T one gets a line y=mx+b with m=?Ea/R and b= ln k0.
-> ?Ea=R*m and k0= e^b

->?Ea= 127.81 KJ/mol and k0= 6.042*10^4 1/s

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