Select the two conditions that must be met by a thermochemical equation so that its standard enthalpy change?

can be written as ΔH°f.





1. The values of ΔH for each substance must be specified.





2. One mole of each reactant is used.





3. One mole of a compound is produced.





4. The reactants are found in their standard states.





5. All substances are at 0°C and 1 atm pressure.





6. One kilogram of the substance is produced.

Select the two conditions that must be met by a thermochemical equation so that its standard enthalpy change?
must be one mole of each and found in their standard states

phlox