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Question
A 500-cm3 sample of 1.0 M NaOH(aq) is added to 500 cm3 of 1.0 M HCl(aq) in a Styrofoam cup, and the solution is quickly stirred. The rise in temperature (
T1) is measured. The experiment is repeated using 100 cm3of each solution, and the rise in temperature (T2) is measured. What conclusion can you draw about T1 and T2?
HCl(aq) + NaOH(aq) →H2O(l) + NaCl(aq); Hº= -55.8 kJ
A) T2 is greater than T1.
B) T2 is equal to T1.
C) T1 is five times as large as T2.
D) T1 is less than T2.
E) T2 is five times as large as T1.
Answer
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