What is the enthalpy of solution of NH4CI?
Correct answer: C. 16.2 kJ/mol
- A. 15 kJ/mol
- B. -17 kJ/mol
- C. 16.2 kJ/mol
- D. -16.5 kJ/mol
Explanation
The enthalpy of solution (∆Hosol) of ammonium chloride (NH4Cl) is +16.2 kJ/mol. This value is positive, indicating that the dissolution process is endothermic, meaning it absorbs heat from the surroundings. Option C correctly identifies this value. Other options are incorrect because they either provide incorrect numerical values or incorrectly suggest that the process is exothermic with a negative enthalpy of solution.
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
Bond formation is associated with:
If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air:
Which one of the following statements is correct for the standard enthalpy change of neutralization of a strong acid by a strong alkali in aqueous solution at 25°C?
The sum of all kinds of energy of system is called internal energy. They include
The enthalpy change for the process C(s) ➝ C(g)corresponds to enthalpy of
'∆H' Will be given a negative sign in: