It is common knowledge that chemical reactions occur more rapidly at higher temperatures. Everyone knows that milk turns sour much more rapidly if stored at room temperature rather than in a refrigerator, butter goes rancid more quickly in the summer than in the winter, and eggs hard-boil more quickly at sea level than in the mountains. For the same reason, cold-blooded animals such as reptiles and insects tend to be noticeably more lethargic on cold days.
- 184.108.40.206: The Arrhenius Equation
- This page examines rate constant variation with temperature and activation energy, as shown by the Arrhenius equation.
- 220.127.116.11: The Arrhenius Law - Arrhenius Plots
- The Arrhenius plot is used to study the effect of temperature on reaction rates. The Arrhenius plot is obtained by plotting the logarithm of the rate constant, k, versus the inverse temperature, 1/T. The resulting negatively-sloped line is useful in finding the missing components of the Arrhenius equation.
- 18.104.22.168: The Arrhenius Law - Pre-exponential Factors
- The pre-exponential factor is part of the Arrhenius equation, which was formulated by the Swedish chemist Svante Arrhenius in 1889. The pre-exponential factor is also known as the frequency factor, and represents the frequency of collisions between reactant molecules. Although often described as temperature independent, it is actually dependent on temperature because it is related to molecular collision, which is a function of temperature.