Part (a), we're being asked to determine what is meant by the term standard conditions with reference to enthalpy changes.
With reference to enthalpy changes, standard conditions are when:
Pressure is equal to 1 atm and at some common temperature, usually 298 K.
(a) What is meant by the term standard conditions with reference to enthalpy changes?
(b) What is meant by the term enthalpy of formation?
(c) What is meant by the term standard enthalpy of formation?
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