What is lamina?

Explanation

Given reaction is
`H-underset(Cl)underset(|)overset(H)overset(|)C-Cl to C(g)+2H(g)+2Cl(g)`
as we know that `Delta H^(@) = sum BR_(R) - sum B.E_(F)`
`Delta_(r)H6(@) = [2(414)+2(330)]-0`
= 228 + 660 = 1488 kj/mol