Stoichiometry
For an ideal gas, the compressibility factor

Decreases with pressure rise
Zero
Is unity at Boyle's temperature
Is unity at all 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 completely
Only OH⁻ and H⁺ ions react in every case
The salt formed does not hydrolyse
The strong base and strong acid reacts in aqueous solution

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