Enthalpy change can be measured in which units?

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Multiple Choice

Enthalpy change can be measured in which units?

Explanation:
Enthalpy change is an energy transfer, so its units are energy units. The joule is the SI unit of energy, so you can express ΔH in joules. In chemistry, using kilojoules is common because reaction energies are often sizable, and 1 kilojoule equals 1000 joules. So the same enthalpy change can be written in either unit, depending on the scale. J/kmol isn't a standard way to report ΔH; it would describe energy per amount of substance and isn’t how enthalpy change is typically given here. (When dealing with per-mole values, you’d often see kilojoules per mole, but that isn’t listed in these options.)

Enthalpy change is an energy transfer, so its units are energy units. The joule is the SI unit of energy, so you can express ΔH in joules. In chemistry, using kilojoules is common because reaction energies are often sizable, and 1 kilojoule equals 1000 joules. So the same enthalpy change can be written in either unit, depending on the scale. J/kmol isn't a standard way to report ΔH; it would describe energy per amount of substance and isn’t how enthalpy change is typically given here. (When dealing with per-mole values, you’d often see kilojoules per mole, but that isn’t listed in these options.)

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