For the gas phase decomposition of t-butyl propionate,C2H5COOC(CH3)3 (CH3)2C=CH2 + C2H5COOHthe rate constant at 540 K is 8.90×10-4 s-1 and the rate constant at 578 K is 9.83×10-3 s-1. The activation energy for the gas phase decomposition of t-butyl propionate is kJ/mol.
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Ответ:
The activation energy is 164.02 kJ/mol
Explanation:
Log (k2/k1) = Ea/2.303R × [1/T1 - 1/T2]
k1 = 8.9×10^-4 s^-1
k2 = 9.83×10^-3 s^-1
R = 8.314 J/mol.K
T1 = 540 K
T2 = 578 K
Log (9.83×10^-3/8.9×10^-4) = Ea/2.303×8.314 × [1/540 - 1/578]
1.043 = 6.359×10^-6Ea
Ea = 1.043/6.359×10^-6 = 164020 J/mol = 164020/1000 = 164.02 kJ/mol
Ответ:
Explanation:
As the pickle jar was placed inside the refrigerator so, due to the decrease in temperature of the refrigerator the lid faced contraction in size.
As a result, it became tightly fitted over the mouth of the jar.
But when the lid was held under the hot water from your sink's faucet for a few seconds, then it undergoes a thermal expansion.
As a result, size of lid expanded as compared to the size of mouth of the jar. Hence, the lid is able to be opened up.