C-H Bond +4 kJ/mol

[Camila Bautista 3I]

Is the +4 a predetermined value? Or is there a way to calculate it? And what exactly does it indicate?
So for example, "The relative energy difference between the eclipsed and staggered conformations of ethane is approximately -12 kJ/mol. Since ethane's eclipsed conformation has three pairs of eclipsed C-H bonds we can estimate that each unfavorable interaction per pair of eclipsed C-H bonds is +4 kJ/mol."

Was the -12 kJ/mol a predetermined value?

[Kurtis Lavelle 1k]

The -12 kJ is the given value. Since we know that there are three eclipsed bonds, we divide by three to get the 4kJ value. The 4kJ value indicates the extra energy it takes to form this conformation.

[Nikhita_Jaaswal_2H]

This value is calculated and is constant for all the C-H bonds

[Narin Maisha 2H]

The -12kJ is a predetermined value and the value +4kJ/mol is a calculated value found later.

[marcelnajjar]

Is the +4 a predetermined value? Or is there a way to calculate it? And what exactly does it indicate?
So for example, "The relative energy difference between the eclipsed and staggered conformations of ethane is approximately -12 kJ/mol. Since ethane's eclipsed conformation has three pairs of eclipsed C-H bonds we can estimate that each unfavorable interaction per pair of eclipsed C-H bonds is +4 kJ/mol."

Was the -12 kJ/mol a predetermined value?

Yes it is predetermined and a constant value for bonds