Learning Goal: equation is called the barometric formula. We can use these relationships to calculate the rates of chemical reactions in the atmosphere. Part A The temperature dependent rate constant is k=1.71010e260K/TM1s1. Calculate the reaction rate if the temperature at z=15km is T=220K. Part B Using the data in Part A, calculate the chlorine concentration at z=50km. Assume the atmospheric temperature is T=220K