When 1-pentyne (A) is treated with 4N alcoholic KOH at 175°C, it

Aiswarya Ram Gupta Grade: 12


                        When 1-pentyne (A) is treated with 4N alcoholic KOH at 175°C, it is converted slowly into an equillibrium mixture of 1.3% 1-pentyne (A), 9.5% 2-pentyne (B) and 3.5% of 1.2-pentadiene (C) .The equillibrium was maintained at 175°C. Calculate ΔG° for the following eqilibria. B ↔ A, ΔG°1=?? B ↔ C, ΔG°2=?? From the calculated value of ΔG°1 & ΔG°2 indicate the order of stabiity of (A), (B), & (C). Write a reasonable reaction mechanism showing al intermediates leading to (A), (B) & (C).

9 years ago

Answers : (2)

SAGAR SINGH - IIT DELHI

879 Points

Dear student,

Gibbs Free Energy (G) - The energy associated with a chemical reaction that can be used to do work. The free energy of a system is the sum of its enthalpy (H) plus the product of the temperature (Kelvin) and the entropy (S) of the system:

Free energy of reaction (G)

The change in the enthalpy (H) of the system minus the product of the temperature (Kelvin) and the change in the entropy (S) of the system:

Standard-state free energy of reaction (G)

The free energy of reaction at standard state conditions:

Standard-state conditions

The partial pressures of any gases involved in the reaction is 0.1 MPa.
The concentrations of all aqueous solutions are 1 M.

Measurements are also generally taken at a temperature of 25C (298 K)

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Sagar Singh

B.Tech, IIT Delhi