Question

4. Shelf Life at 0.01 °C (8 p). Assuming the reaction solution does not freeze at 0.01 °C, calculate the t₉₀ (shelf-life) for  your unknown at 0.01 °C assuming the activation energy, E_a, for the process is 73 kJ/mol. Show all work. Symbolically state the equations you are using defining all variables and constants. (Hint, the material in U5 M3 under “Temperature Effects” may prove useful).

Givings

R= 0.008314

K1= 5E-08

T1= 0.01C= 273.16K

T2=24C=297.15K

Ea= 73 kj/mol

Can you solve it for me? Please!

Answer 1

der IATE dere rate constant (e) at o.olc is at 273.16 K given S0 X10-8 Here order of reaction not given So, assuming reaction is 1st order for 1st order reaction we get, en CAL. = kt where, TA = Initial concentration of acaitant A = Reactant concentration at 't' time karate constant t = time at to; 90% of Ao will be converted to Enduct. So, here, (A = 2 (100-90)% = 10%. here, TAI. = 18). (+16%. ķ= 5:0X10-8 +-) en (pl.) - 5.0x108 xt en Fipul - le 10 = 5.0 8188 & = 460 17oll 5.04168 4.6 2107 unit here, unite of time norgiven So, tao = 4.6 x 16 7 weit C# I think her, T, = 287. 15k mit T = 2721667 lalo t = then he will be used by for benivors eaution 1