Answer:
When a process is reversed the sign of a enthalpy change is reversed & magnitude is same.
Explanation:
When process is reversed then Sign of the enthalpy change is also reversed. because when the process is reversed then exothermic process becomes endothermic & endothermic becomes exothermic. So that sign of the enthalpy change for a process is reversed & magnitude is constant in both cases.
Therefore when a process is reversed the sign of a enthalpy change is reversed & magnitude is same.
