In which case of mixing of a strong acid and a base, each of 1(N) concentration, temperature-increase is the highest?
Correct answer: C. 25 ml acid and 25 ml alkali
- A. 20 ml acid and 30 ml alkali
- B. 10 ml acid and 40 ml alkali
- C. 25 ml acid and 25 ml alkali
- D. 35 ml acid and 15 ml alkali
Explanation
When 25 ml acid reacts with 25 ml of alkali, maximum equivalent of acid is reacting with alkali. Since the volume of the resulting solution is the same in every case, therefore, increase in temperature is the highest where maximum equivalents of acids and alkalies are reacting.
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About Enthalpy
Enthalpy is the heat content of a system measured at constant pressure, and its change indicates whether a reaction or physical process is endothermic or exothermic. The topic covers state functions, enthalpy diagrams, standard enthalpy of formation, combustion and neutralisation, and the relationship between ΔH and internal energy change.
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