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# Two systems have same heat capacity C {ignore pressurefyolume for this problem]. One is at temperature T+t and the other is at temperature Tt. Two...

I want to know how to solve these problems by steps, it is about thermodynamics

Two systems have same heat capacity C {ignore pressurefyolume for this problem]. One is attemperature T+t and the other is at temperature T—t. 1. Two systems are put in thermal contact. Find out the ﬁnal temperature and the change oftotal entropy2. Operate a reversible thermodynamics engine between the two system until the two reach equilibrium. Find out the ﬁnal temperature of the systemm .