Hydrogen bromide, HBr, is a colourless gas. Consider its dissociation reaction 2HBr (g) « H2 (g)...

Hydrogen bromide, HBr, is a colourless gas. Consider its dissociation reaction 2HBr (g) « H2 (g) + Br2 (g) DfHo (kJ/mol) -36.4 +30.9 So (J/K.mol) +198.7 +130.7 +245.5 ooo a) Determine DeltaH , DeltaS , DeltaG , and Kp (all at T= 298 K) for this reaction. b) A 100. mL constant volume reaction vessel is loaded with 0.05 mol HBr and heated to 800 K. Calculate the equilibrium constant for this temperature and the partial pressure of Br2 in the equilibrium mixture. Assume Delta standard H and Delta standard S to be independent of temperature.

Correct Answers:

DHo=103.7 kJ/mol, DSo=-21.2 J/K mol, DGo=110.0 kJ/mol, K=5.25 x 10-20

PBr2= PH2=3.78x x 10-3 atm (PHBr is essentially unchanged).

Please show solution

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Expert Solution

Since moles of HBr change very small hence assuming its partial pressure remains unchanged.

Please give me better rattings.

Thankyou.

queen_honey_blossom answered 4 months ago

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