The value o f Δ G ° for the phosphorylation o f glucose in glycolysis is 13.8 kJ/mol. The value of Kc at 298 K is

Question

The value o f Δ G ° for the phosphorylation o f glucose in glycolysis is 13.8 kJ/mol. The value of Kc at 298 K is (A) 2.5 × l03  (B) 3.81 × l0-3  (C) 5.0 × l0-4  (D) 8.5 × l0-3

Tardigrade Admin · Accepted Answer

Δ G° = 13.8 kJ/mol = 13.8 × 103 J/mol Also, Δ G° = - RT lnKc Hence, In Kc = -13.8 × 103 J/mol (8.314 J mol-1 K-1 × 298 K) In Kc = - 5.569 Kc = e- 5.569 Kc = 3.81 × 10-3

Q. The value o f $Δ G °$ for the phosphorylation o f glucose in glycolysis is $13.8 k J / m o l .$ The value of $K_{c}$ at $298 K$ is

$2.5 \times l 0^{3}$

$3.81 \times l 0^{- 3}$

$5.0 \times l 0^{- 4}$

$8.5 \times l 0^{- 3}$

$Δ G ° = 13.8 k J / m o l = 13.8 \times 1 0^{3} J / m o l$
Also, $Δ G^{\circ} = - RT l n K_{c}$
Hence,
In $K_{c} = - 13.8 \times 1 0^{3} J / m o l (8.314 J m o l^{- 1} K^{- 1} \times 298 K)$
In $K_{c} = - 5.569$
$K_{c} = e^{- 5.569}$
$K_{c} = 3.81 \times 1 0^{- 3}$

Q. The value o f ΔG° for the phosphorylation o f glucose in glycolysis is 13.8kJ/mol. The value of Kc​ at 298K is

2.5×l03

3.81×l0−3

5.0×l0−4

8.5×l0−3