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0.333333 cal/g-°C

Explanation:

Energy = mass x specific heat capacity x temperature change.

(E = mcΔT)

Energy = 100.0 cal

specific heat capacity c= unknown

mass m = 4.0 g

temperature change ΔT = 100 - 25 =75°

100 = 4c(75)

c = 0.333333 cal/g-°C

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