Question

Part A)

A certain first-order reaction has a rate constant of 2.40×10⁻² s−1 at 25 ∘C. What is the value of k at 60 ∘C if Ea = 74.0 kJ/mol ?

Express your answer using two significant figures.

Part B)

Another first-order reaction also has a rate constant of 2.40×10⁻² s−1 at 25 ∘C. What is the value of k at 60 ∘C if Ea = 135 kJ/mol ?

Express your answer using two significant figures.

Answer 1

Az = A e talRtz w [ Temperature dependence of rate u) - Resistent I ki = A Ealati - lii) Diriling eqn ci) by equ lil we get Az erot, tad den met lo ta] dengan lain se lor ] Given: k, = 2.90x15²517,225 c = (25+273) K = 2988 K2 = ? . T2 = 602 = (60+273) K = 333K. { a = 74 kJ/mol = 74x10² molt

werke 174% 10% meetrit 333K 2.303 x 8.31435 mort (298 2.30348. 314 XA x 298% *333K/ login or ) = 74x10° x 35% lego (por ) - 2 = 1:36 lo yo = 104363 23.07 74100X35 a aa 1.363 19,147 x 298 4333 s' 2 -1 Kos 2.40x10459x 23.07 = 55x10's' =0.555'

B) logo los hotel ) liven: kg = 2140x 1025 T = 25°c = (25+273) K 2 2988 K2=? Izabolca (60+273) K = 333K Ea = 135kg/mol = 135x103J mol" K2 10 : 135x103 s mox 8.303X8.3145 X moet 129816 10 3331 O XOS og or otra person er Lanok Book] Togo Tokelau Total = 135*10*35\___ legno In horlog = 2.487 J 2.303*8.314 K 298X333 X 162.487 r K2 306.9 12.40 x 10251 K₂ = 2.400105 x 306.9 = 7.451