Home
Class 12
CHEMISTRY
Delta G^circ' Vs. T plot in the Ellingha...

`Delta G^circ' Vs. T` plot in the Ellingham's diagram slopes downward for the reaction : `Mg+2 O_2 rarr MgO`, `2 Ag+1 / 2 O_2 rarr Ag_2 O`, `C+1 / 2 O_2 rarr CO` , `CO+1 / 2 O_2 rarr CO_2`

A

`Mg + (1)/(2) O_2 rarr MgO`

B

`2Ag + (1)/(2) O_(2) rarr Ag_(2)O`

C

`C + (1)/(2)O_(2) rarr CO`

D

`CO + (1)/(2)O_(2) rarr CO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`C(s) + (1)/(2) O_(2(g)) rarr CO_((g)) : DeltaS` increase .
Hence, as the temperature increases, `T Delta S` increases and hence `Delta G (Delta H - T DeltaS)` decreases. In other words, the slope of the curve for formation of CO decreases. However, for all other oxides, it increases.
Promotional Banner

Similar Questions

Explore conceptually related problems

Balance the following chemical equations. Mg + O_2 rarr MgO

Identify the oxidising and reducing agents in the reaction: Cus +O_2 rarr Cu+SO_2

The reaction 2H_2O (l) rarr 4H^+ +O2+2e^-

Balance the chemical equation H_2 + O_2 rarr H_2O

Classify the given chemical reactions into combination,displacement,decomposition and double dispacement reaction. a) Mg + O_2 rarr 2MgO b) H_2 + I_2 rarr 2HI c) 2H_2O rarr 2H_2 + O_2 d) NaCl + AgNO_3 rarr AgCl + NaNO_3 e) Zn SO_4 + BaCl_2 rarr BaSO_4 + Zn Cl_2 f) Zn + H_2SO_4 rarr ZnSO_4 + H_2 g) FeSO_4 + Zn rarr ZnSO_4 + Fe h) CaCO_3 rarr CaO + CO_2

In the chemical reaction, Ag_2O + H_2O + 2e^- rarr 2Ag + 2OH^-

In the chemical reaction, Ag_2O + H_2O + 2e^- rarr 2Ag + 2OH^-

Complete the following reactions? C_2H_4+O_2rarr

Complete the following reactions: CaC_2 +H_2O rarr ……………