The values of Δ H and Δ S for the reaction, C (graphite) + CO 2( g ) arrow 2 CO ( g ) are 170 kJ and 170 JK -1 respectively. This reaction will be spontaneous at -

Question

The values of Δ H and Δ S for the reaction, C (graphite) + CO 2( g ) arrow 2 CO ( g ) are 170 kJ and 170 JK -1 respectively. This reaction will be spontaneous at - (A) 510 K (B) 710 K (C) 910 K (D) 1110 K

Tardigrade Admin · Accepted Answer

For a spontaneous reaction Δ G =- ve Or ar eq. Δ G =0 Δ H = T Δ S T =(Δ H /Δ S ) =(170 × 103/170) =1000 K

Q. The values of $Δ H$ and $Δ S$ for the reaction, $C$ (graphite) $+ C O_{2} (g) \to 2 CO (g)$ are $170 k J$ and $170 J K^{- 1}$ respectively. This reaction will be spontaneous at -

510 K

710 K

910 K

1110 K

For a spontaneous reaction

$Δ G = - v e$

Or ar eq. $Δ G = 0$

$Δ H = T Δ S$

$T = \frac{Δ H}{Δ S}$

$= \frac{170 \times 1 0 ^{3}}{170}$

$= 1000 K$

Q. The values of ΔH and ΔS for the reaction, C (graphite) +CO2​(g)→2CO(g) are 170kJ and 170JK−1 respectively. This reaction will be spontaneous at -