Question

Which of the following mixtures on neutralization will show the same rise in temperature?

• A. 60 mL of 0.1 M $HCl$ + 60 mL of 0.1 M $NaOH$
• B. 30 mL 0.1 M $HCl$ + 30 mL 0.1 M $NaOH$
• C. 40 mL 0.1 M $HCl$ + 30 mL 0.1 M $NaOH$
• D. 60 mL 0.1 M $HCl$ + 100 mL 0.1 M $NaOH$

Answer 1

Answer: (A), (B)

The correct options are
A 60 mL of 0.1 M $HCl$ + 60 mL of 0.1 M $NaOH$
B 30 mL 0.1 M $HCl$ + 30 mL 0.1 M $NaOH$

(a) Generates $\frac{60\times 0.1\times 13.7}{1000}kcal$ heat which is used by 120 mL solution.
(b) Generates $\frac{30\times 0.1\times 13.7}{1000}kcal$ heat which is used by 60 mL solution.
(c) Generates $\frac{30\times 0.1\times 13.7}{1000}kcal$ heat which is used by 70 mL solution.
(d) Generates $\frac{60\times 0.1\times 13.7}{1000}kcal$ heat which is used by 100 mL solution.
(a) and (b) would be the correct answers.