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Final Temperature Calculation

APCHEM-GNDYII

A mixture of 20.0 g of equal masses of two metals, copper and iron, heated to 100$^o$C, is added to a calorimeter containing 100. g of water at 25.0$^o$C.

The specific heat of copper is 1.61 cal/g$^o$C, and the specific heat of iron is 1.88 cal/g$^o$C.

What is the final temperature of the system?

A

44.4$^o$C

B

51.2$^o$C

C

31.5$^o$C

D

40.0$^o$C