IS IT CORRECT Difference between formation enthalpy and reaction enthalpy ∆fH →1 formed from consituent element - Chemistry - Thermodynamics

Question

IS IT CORRECT ?
Difference between formation enthalpy and reaction enthalpy
∆ f H   → 1   f o r m e d   f r o m
  c o n s i t u e n t   e l e m e n t    
                 
      2   1   m o l e   o f   p
r o d u c t   i s   f o r m e d ∆ r H → 1
  m a y   o r   m a y   n o t   b e  
f o r m e d   f r o m   c o n s t i t u e n t   e l
e m e n t                
            2   1   m o l e
  o f   p r o d u c t   m a y   o r   m a
y   n o t   b e   f o r m e d

Ashish Khanna · Accepted Answer

Dear Student
The standard enthalpy of reaction: (denoted
ΔrHâŠ–) is the
enthalpy change (amount of heat absorbed or evolved) that occurs in
a system when one mole of matter is transformed by a chemical
reaction under standard conditions
The standard enthalpy of formation or standard heat of
formation: It is the change of enthalpy that accompanies
the formation of 1 mole of the compound from its elements, with all
substances in their standard states Its symbol is
ΔHfO or
ΔfHOThe superscript theta (zero) on
this symbol indicates that the process has been carried out under
standard conditions
For example:
The standard enthalpy of formation of carbon dioxide would be
the enthalpy of the following reaction under the conditions above:
C(s,graphite) + O2(g) →
CO2(g)

Hence your statements are correct

Regards