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Q.

Which of the following enthalpy may be positive or negative?

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a

Enthalpy of hydration

b

Enthalpy of atomisation

c

Enthalpy of combustion

d

Enthalpy of solution

answer is C.

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Detailed Solution

Change of enthalpy of solution is the amount of heat which is released while the dissolving process ( constant P). 

It can be positive (for endothermic) or negative (for exothermic)

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