Stirred tank is used to heat 100 kg of a 45% glycerol solution in water. Assume that the tank is in adiabatic state. An electrical coil delivers 3 kW of power to the tank; 88% of the energy delivered by the coil goes into heating the vessel contents. The glycerol solution is initially at 15℃. Assuming glycerol and water form an ideal solution, how long will the solution take to reach 100℃?

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