Question

Which of the following mixing of 1M base and 1M acid leads to the largest increase in temperature?

• A. 30 mL \( \text{CH}_3\text{COOH} \) and 30 mL NaOH
• B. 45 mL \( \text{CH}_3\text{COOH} \) and 25 mL NaOH
• C. 50 mL HCl and 20 mL NaOH
• D. 30 mL HCl and 30 mL NaOH

Hint:

Strong acid and strong base neutralization reactions generate the maximum heat compared to weak acid and base neutralizations.

Answer 1

The Correct Option is C

- The heat generated in an acid-base neutralization reaction is proportional to the amount of acid and base mixed, which is the product of the molarities and volumes.
- The combination that results in the largest heat release will have the highest product of molarities and volumes.
- When comparing the options, the mix of 50 mL of HCl and 20 mL of NaOH will have the highest heat increase since it involves a strong acid and a strong base, leading to the largest amount of heat generated.

Final Answer: Option (3).