Consider the reaction at 300 K H₂ (g) + Cl₂ (g) = 2HCl (g) , heat of enthalpy = -185 KJ
If 3 mole of H₂ completely reacts with 3 mol of Cl₂ to form HCl, change in internal energy of the reaction will be
a) Zero
b) -185 KJ
c) 555 KJ
d) None of these