Stoichiometry
For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.

Dry bulb temperature
Humidity
Relative saturation
Wet bulb temperature

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Stoichiometry
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because

The strong base and strong acid reacts in aqueous solution
The strong base and strong acid reacts completely
The salt formed does not hydrolyse
Only OH⁻ and H⁺ ions react in every case

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