# standard enthalpies of formation

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• October 13th 2008, 03:55 PM
viet
standard enthalpies of formation
Quote:

Use standard enthalpies of formation to calculate the standard change in enthalpy for the melting of ice. (The /_\ $H_f$ for $H_2O$ is -291.8 kJ/mol).
Quote:

/_\ $H_f$ = ___ kJ/mol
Im not sure how to solve this problem, can someone help with this?