Practicing Success
Graph between log10 k and (1/T) is linear of slope S. Hence Ea is: |
R × S S/R R/S 2.303 RS |
2.303 RS |
The correct answer is option 4. 2.303 RS. We are given that the graph between \(\log_{10} k\) and \(\frac{1}{T}\) is linear with a slope \(S\). From the Arrhenius equation: \(k = A \cdot e^{-\frac{E_a}{RT}} \) Taking the logarithm (base 10) of both sides: \(\log_{10} k = \log_{10} A - \frac{E_a}{2.303RT} \) Comparing this equation with the linear equation: \(\log_{10} k = m \cdot \left(\frac{1}{T}\right) + c \] We can see that the slope of the linear equation is \(\frac{-E_a}{2.303RT}\). Therefore, the slope (\(S\)) is equal to \(\frac{-E_a}{2.303RT}\). Rearranging the equation, we find: \( E_a = -2.303RT \cdot S \) Thus, the correct answer is: (4) \(2.303RS\) |