# Problem: At 28 oC, raw milk sours in 4 h but takes 50 h to sour in a refrigerator at 5 oC.Estimate the activation energy in kJ/mol for the reaction that leads to the souring of milk.

###### FREE Expert Solution

We are asked to calculate for the activation energy of a chemical reaction given with two temperatures and two reaction times.

The equation that connects two given temperatures and two reaction times with the activation energy is the two-point form of the Arrhenius equation:

where: k1 is the rate of first reaction

k2 is the rate of second reaction

Ea is the activation energy

R is the gas constant

T1 is the temperature for the first reaction

T2 is the temperature of the second reaction

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###### Problem Details

At 28 oC, raw milk sours in 4 h but takes 50 h to sour in a refrigerator at 5 oC.

Estimate the activation energy in kJ/mol for the reaction that leads to the souring of milk.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Arrhenius Equation concept. You can view video lessons to learn Arrhenius Equation. Or if you need more Arrhenius Equation practice, you can also practice Arrhenius Equation practice problems.