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Moderate

Calorimetry System

APCHEM-N2QN1E

A sample of aluminum ($C_p$ = 0.900 J/g$^{\circ}$C) is heated and dropped into a calorimeter containing 100.0 g of water ($C_p$= 4.18 J/g$^{\circ}$ C) at 25$^{\circ}$C.

After some time, the final temperature of the system is measured at 83.1$^{\circ}$C.

Which of the following was the amount of heat released by the aluminum sample?

A

+24.3 kJ

B

-24.3 kJ

C

+5.23 kJ

D

-5.23 kJ