Processes involving solid and liquid have their:
Correct answer: C. 𝚫H=𝚫E
- A. 𝚫H=𝚫E +P𝚫V
- B. 𝚫H=P𝚫V
- C. 𝚫H=𝚫E
- D. 𝚫H=0
Explanation
Option C is correct as ΔH=ΔE+PΔV and for a process involving solids and/or liqiuds, ΔV≅0. Therefore, 𝚫H=𝚫E. There is a change in the internal energy of the process with the environment.
This question appeared on the KMU MDCAT 2023 paper, which you can sit online with every answer explained.
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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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