Two objects, B1(T=40°C) and B2(T=18°C), experienced entropy changes of 6.4 x 10^4 J/K and 2.8 x 10^4 K, respectively after they had been placed in direct contact with each other. B1 lost 2.0 x 10^7 J of heat. How much heat was lost by B2? What was the entropy change in the universe after the process?
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