Question

The standard molar heat of formation of water is -258.8 kJ/mol.

a. What is the significance of the negative sign associated with this value?

b. why is the magnitude of this value so much larger than the heat of vaporization of water (?H° vap = 41 kJ/mol)?

c. Calculate the amount of heat produced in making 50.0 mL of water from its elements under standard conditions.

Answer 1