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# Heat Transfer

APCHEM-YUMDXN

All of the following reactions are seen in an AP laboratory course.

Which of the following reactions between equal masses of reactants shows the maximum relative amount of heat transfer from a system to the surroundings?

A

$NH_4Cl_{(s)} + H_2O$

B

$HC_2H_3O_2+ NaHCO_{3(s)}$

C

$CuSO_{4(s)} + H_2O$

D

$NaOH_{(s)} + H_2O$