Question

Chapter 14 Chemica © Kamry pring20 - MCVEY (Sec. 255) > Activities and Due Dates > Chapter 14 Chemical Kinetics Homework nment Score: 35% Resources Hint che on 30 of 30 > The reaction C,H,(g) →2C,H,(8) has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, k, is 6.1 x 10-5-1. What is the value of the rate constant at 755.0 K? Pub Question Source: MRG - General Chemistry terms of use contact us help about us Careers privacy policy

Answer 1

- ant, 'k, = 6.1 x 10-88-1 reaction Cung (g) 26 Hy (g) (1 kJ = 10005) Activation ena on energy, Ea= 262 kJ/mol = 262x1000 J/mol • EQ = 262000 J/mol At temperature T,=600k ; rate constant, k, = 6.1 x 10 at temperature, T2 = 75k; let sate constant = R₂ By Arrhenius equation .. Ti Temperature R: Universal gas constant = 8.314 3 khmot A: Pre exponential factor (onstant for a reaction) if Temperature changes R2 = A e-Ea RT2 . k = A e FalRT, A 'Ea, a same. Dividing ke by ki a S k= A - EART ki rate constant $2 - A e Ecal Pla RiAe-Fall T, = e (t =) Recents ). R₂ = h, e tal (itt kx=161216-854) e 29 si eu metu Gak dow) =76-1810-85-1) .-31513.11K (0.001324 - 0.001667)k-1 2(6.1810-65-") 31513.11(-0.000343) -(6-1870-88-) €10.809 = (6.1810-86-)) (49463.98) = 301730-278 x 10-8 9-1 ke = 3.017 x 10-35-1 Rate constant at 755 K = kg = 3.017X10-35-1