Question

The activation energy for the decomposition of HI to H2 and I2 is 186 kJ/mol. The rate constant for this reaction at 555 K is 3.52 x 10-7 L/(mol. s). What is the rate constant at 645 K?

Answer 1

We have that for the Question "What is the rate constant at 645 K?" it can be said that  the rate constant at 645 K is

• k2=9.756^10^{-5}l/mol-s

From the question we are told

• The activation energy for the decomposition of HI to H2 and I2 is 186 kJ/mol.
• The rate constant for this reaction at 555 K is 3.52 x 10-7 L/(mol. s).
• What is the rate constant at 645 K?

the rate constant at 645 K

Generally the equation for the Arrhenius equation   is mathematically given as

$ln(\frac{k2}{k1})=\frac{E}{R}(\frac{1}{t_1}-\frac{1}{t_2})$

Therefore

$ln(\frac{k2}{k1})=\frac{E}{R}(\frac{1}{t_1}-\frac{1}{t_2})\\\\ln(\frac{k2}{3.52*10^{-7}})=\frac{186}{8.314}(\frac{1}{555}-\frac{1}{645})$

• k2=9.756^10^{-5}l/mol-s

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