Question

17. The following reactions carried in open vessel. The reaction for which AM = AU will be
(1) PCI,(9) → PCI (9) + Cl (9)
(2) 200(9) +0,19) - 2009)
(3) N (9) + 3H2(g) → 2NH3(g)
(4) H (9) + 1,(9) -- 2H|(9)​

Answer 1

Answer:

The solution for Q17, is as follows:

We know thatΔH=ΔU+ΔngRTIf Δng =0. only then, ΔH=ΔUWe know that Δng= nproducts −nreactantsIn equation (4)H2(g)+ I2(g)→2HI(g)Δng =2−2=0Hence, ΔH=ΔUWe know that∆H=∆U+∆ngRTIf ∆ng =0. only then, ∆H=∆UWe know that ∆ng= nproducts -nreactantsIn equation (4)H2(g)+ I2(g)→2HI(g)∆ng =2-2=0Hence, ∆H=∆U  

Hence option (4) is the correct answer.

Explanation: