5.5 Standard Enthalpies of Formation

Question 1

ΔH°f

Answer 1

change in enthalpy that occurs when 1 mole of a compound is formed from its elements, with all substances being in standard states.

Question 2

Degree sign on the symbol ΔH°f indicates that
the process takes place under ________
conditions (25 degrees celcius, 100 kPa).

Answer 2

standard

Question 3

The standard enthalpy of formation ΔH°f of an
ELEMENT in its standard state is ____

Answer 3

zero