Enthalpy of a reaction can be measured by ____________________?
Correct answer: A. glass calorimeter
- A. glass calorimeter
- B. manometer
- C. Barometer
- D. thermometer
Explanation
A calorimeter measures the heat absorbed or released by a reaction, and at constant pressure this heat is related to the reaction enthalpy, qP = ΔH. Students may choose thermometer because it records temperature, but temperature change must be converted through calorimetry to obtain enthalpy.
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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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