NEET2006ChemistryThermodynamics (C)Actual
The enthalpy and entropy change for the reaction: Br _ 2( l ) + Cl _ 2(g) 2 BrCl _ (g) are 30 ~kJ ~mol ⁻¹ and 105 ~J ~K ⁻¹ ~mol ⁻¹ respectively. The temperature which the reaction will be in equilibrium is:
Options
- A300 ~K
- B285.5 ~K
- C273 ~K
- D450 ~K
Correct answer
B. 285.5 ~K
Step-by-step solution
For the reaction gathered Br ₂(l)+ Cl ₂(g) 2 BrCl (g) H =30 ~kJ / mol S =105 JK ⁻¹ ~mol ⁻¹ gathered For at equilibrium G =0 aligned & G = H - T S & H = T S & T = H S = 30 1000 ~J ~mol ⁻¹ 105 JK ⁻¹ ~mol ⁻¹ & =285.7 ~K & aligned