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Unformatted text preview: of ln k vs
1/T with a negative slope. Slope of the line = - Ea/R. Thus Ea can be determined; T
must be in Kelvin, not °C.
o Arrhenius Equation gives the dependence of k on T (equation given in the Data
Ea − RT
booklet): k = A e
: ln k = ln A −
o Ea ⎛ 1 ⎞
R ⎝T ⎠ OR log10 k = log10 A − Ea ⎛ 1 ⎞
⎜ ⎟ where: A, the
2.303 R ⎝ T ⎠ Arrhenius constant is the collision factor that represents the frequency of successful
collisions with the favourable geometry, R is the Ideal Gas Constant (= 8.314 J mol-1 K1
), Ea is the activation energy (the minimum energy required for a reaction to occur),
and T must be in Kelvin scale.
• Molecularity is based on proposed mechanism and refers to the number of particles in
the slow, rate-determining step (i.e., the number of species involved in making the
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This note was uploaded on 09/23/2010 for the course CS 001 taught by Professor Jix during the Spring '10 term at Riverside Community College.
- Spring '10