Question

At constant pressure for which of the reactions shown below should ΔH° be greater than ΔE° ?

I. 2 SO₂(g) + O₂(g) → 2 SO₃(g)
II. C₂₃H₄₈(g) + 35 O₂(g) → 23 CO₂(g) + 24 H₂O(l)
III. H₂(g) + Cl₂(g) → 2 HCl(g)
IV. N₂O₄(g) → 2 NO₂(g)

Answer 1

for chemical Reaction OH= of t ong RT where ong = change no. of gaseous moles I in the Reaction R = gas constant T = Temp. So, if ongo , then OH DE e if ong co then OH CoE 250269) +02092 → 250369) ong = 2-(2+1) = ong =-1 co OH ZOE C23 Hub (9) + 350212) 23 CO2(g) + 24 H2Ole) ong = 23-(1+35) =) ong =-13 OH <UE iii) H2(g) + Cl219 2HCl(s) o ng = 2-(1+1) - ong = 0 OH SAE iu) N₂0ucg) 2 N02 (9) ang = 2-1 = ong =1>0 OH > DE so the Rxn iso (iv) N₂040 200219) A