wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

When 5 mL of a 1.0 M HCl solution is mixed with 5 mL of a 0.1 M NaOHsolution, temperature of solution increases by t C. Which of the following(s) can be predicted from this observation?

A
If 5 mL of 0.1 M HCl is mixed with 5 mL 0.1 M NH3
solution, the temperature rise will be less than t C
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
If 5 mL 0.1 M CH3COOH is mixed with 5 mL 0.1 M NaOH,
the temperature rise will be less than t C
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
If 10 mL of 1.0 M HCl is mixed with 10 mL of 0.1 M NaOH,
the temperature rise will be 2t C
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
If 10 mL of 0.1 M HCl is mixed with 10 mL of 0.1 M NaCl,
the temperature rise will be t C
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B If 5 mL 0.1 M CH3COOH is mixed with 5 mL 0.1 M NaOH,
the temperature rise will be less than t C
Reaction proceeds by limiting reagent only.
Enthalpy of nuetralisation is the change in enthalpy that occurs when one equivalent of acid and base undergo neutralisation to form water and salt.
The enthalpy of neutralisation for between a strong acid and base is 57.62 kJ/mol at 25 C.
Enthalpy of neutralization decreases, when acid or base or both are weak.

a) Since ammonia is a weak base, the heat liberated and temperature rise will be less than t C.
b) Since acetic acid is a weak acid, the heat liberated and temperature rise will be less than t C.
c) Here the number of moles of acid and base are doubled. however since volume is also doubled, the rise in temperature will be same.
d) No heat will be liberated.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon