average bond enthalpy of water is given by: 502+427/2=464 5 KJ/mol Tell me what to call these no - Chemistry - Chemical Bonding and Molecular Structure

Question

average bond enthalpy of water is given by: 502+427/2=464 5
KJ/mol Tell me what to call these no 502 and 427 and where do they
came from?

Anuradha Puri · Accepted Answer

502 and 427 are the bond enthalpies of two OH bonds in water In
case of water, the enthalpy needed to break the two O
â€“ H bonds is different and thus bond enthalpy of
the molecule is calculated as the average bond enthalpy which is
given as :

(502 + 427) /2 = 464 5 KJ/mol

average bond enthalpy of water is given by: 502+427/2=464.5 KJ/mol. Tell me what to call these no. 502 and 427 and where do they came from?