Question

Heat liberated' when 100 mL of 1 N NaOH isneutralised by 300 mL of 1 N HCl

• A. 22 92 kJ
• B. 17.19 kJ
• C. 11.46 kJ
• D. 5.73 kJ

Answer 1

Answer: (D)

100 mL of 1 N NaOH will be exactly neutralised with 100 mL of 1 NHC1.
1000 mL of 1 N NaOH react with 1000 mL of
HC1 to give 57.3 kJ of heat
$\therefore$ 100 mL of 1 N NaOH will react with 100 mL of 1 N HCI to give $\frac{57.3}{1000}\times 100$ = 5.73 kJ of heat