It Can Be Shown That the Change in Entropy in Heating

It can be shown that the change in entropy in heating or cooling a sample is given by the relation $\Delta$ S = mc ln (T_F/T_i) ,where m is the mass of the sample,c is the specific heat of the sample,and T_F and T_i are the final and initial temperatures respectively.What is the change in entropy when 20.0 grams of aluminum with a specific heat of 0.9 J/gm K is heated from 10.0 $^{\circ}$ C to 60.0 $^{\circ}$ C?

A) +2.93 J/K
B) +2.50 J/K
C) 0 J/K
D) -2.93 J/K

Correct Answer:

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