How much heat (in kJ) is released when 1.65 mol NaOH(s) is dissolved in water? (The molar heat of solution of NaOH is -445.1 kJ/mol)

Answer 1

This is merely a dimensional analysis of heat evolution upon dissolution of solute in solvent.

Hence,

#1.65"mol" * (-445.1kJ)/("mol") approx -734kJ#

In English, if I mix this much table salt in a volume of distilled water, that much heat is released. In simpler terms, the water will become warmer.

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Answer 2

Serenity Allen

The heat released when 1.65 mol of NaOH(s) is dissolved in water is -735.32 kJ.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.