MHT CET202311 May 2023Evening ShiftChemistryThermodynamics (C)Actual
Calculate S _ total for the following reaction at 300 ~K . aligned & NH ₄ NO _ 3( ~s ) NH _ ( zq ) ⁺+ NO _ 3( uq ) ⁻ & ( H =28.1 ~kJ ~mol ⁻¹, S _ sys =108.7 ~J ~K ⁻¹ ~mol ⁻¹ ) aligned
Options
- A15.1 ~J ~K ⁻¹ ~mol ⁻¹
- B93.6 ~J ~K ⁻¹ ~mol ⁻¹
- C84.3 ~J ~K ⁻¹ ~mol ⁻¹
- D202.3 ~J ~K ⁻¹ ~mol ⁻¹
Correct answer
A. 15.1 ~J ~K ⁻¹ ~mol ⁻¹
Step-by-step solution
aligned S _ surr & = Q_ rvv T = - H T & = -28.1 10^3 ~J ~mol ⁻¹ 300 ~K & =-93.67 ~J ~K ⁻¹ ~mol ⁻¹ S _ total & = S _ sys + S _ surr & =108.7+(-93.67) & =15.03 ~J ~K ⁻¹ ~mol ⁻¹ aligned