∆H for the reaction: NaOH + CH3COOH → CH3COONa + H2O
Correct answer: B. Less than 57 kJ mal-4
- A. Zero
- B. Less than 57 kJ mal-4
- C. 57KJ mol-1
- D. More than 57 kJ mol-1
Explanation
For weak acid and strong base titration, the heat of neutralization is lesser than the standard value 0f -57kJmol-1. This is due to the incomplete ionization of weak acid.Heat of neutralization of CH3COOH with NaOH is -55.2 kJ mol-1.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
Practise Thermochemistry and Energetics of Chemical Reactions
728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Thermochemistry and Energetics of Chemical Reactions questions
Which one of the following is NOT a state function?
∆H per mole is expressed in the units of :
If enthalpy change is written in negative sign the reaction will be:
A type of enthalpy which is always positive, The enthalpy of:
If C(s) + O2 (g) → CO2 (g);∆H = X, and CO (g) + 1/2 O2 (g) →CO2 (g); ∆H = Y,Then the heat of formation of CO(g) is
The heat of neutralization of a strong acid and strong alkali is 57.0 kJ mol-1. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is: