Given: 2Zn + O_2 rightarrow 2ZnO, Delta G^o = | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The target reaction is: $2ZnS + 3O_2 \rightarrow 2ZnO + 2SO_2$. We can obtain this by manipulating the given equations: $(1) 2Zn + O_2 \rightarrow

Vedclass · Accepted Answer

$-731$

Vedclass · Answer

(A) The target reaction is: $2ZnS + 3O_2 \rightarrow 2ZnO + 2SO_2$. We can obtain this by manipulating the given equations: $(1) 2Zn + O_2 \rightarrow 2ZnO, \Delta G^o = -616 \, J$ $(2) 2ZnS \rightarrow 2Zn + S_2, \Delta G^o = +293 \, J$ (Reversing the second given equation) $(3) S_2 + 2O_2 \rightarrow 2SO_2, \Delta G^o = -408 \, J$ Adding these three equations: $(2Zn + O_2) + (2ZnS) + (S_2 + 2O_2) \rightarrow (2ZnO) + (2Zn + S_2) + (2SO_2)$ Canceling common terms ($2Zn$ and $S_2$): $2ZnS + 3O_2 \rightarrow 2ZnO + 2SO_2$ The total $\Delta G^o = (-616) + (+293) + (-408) = -731 \, J$.

Given: $2Zn + O_2 \rightarrow 2ZnO, \Delta G^o = -616 \, J$; $2Zn + S_2 \rightarrow 2ZnS, \Delta G^o = -293 \, J$; $S_2 + 2O_2 \rightarrow 2SO_2, \Delta G^o = -408 \, J$. The value of $\Delta G^o$ for the reaction $2ZnS + 3O_2 \rightarrow 2ZnO + 2SO_2$ is ....... $J$.

Similar Questions

The heat of hydrogenation of cyclohexene is $28.6 \, kcal$ and that of cyclohexadiene is slightly more than double,$(55.4 \, kcal)$. What will be the heat of hydrogenation of benzene,which contains three double bonds?

If the bond dissociation energies of $XY$,$X_2$,and $Y_2$ (all diatomic molecules) are in the ratio of $1 : 1 : 0.5$ and $\Delta_f H$ for the formation of $XY$ is $-200 \ kJ \ mol^{-1}$,the bond dissociation energy of $X_2$ will be in $kJ \ mol^{-1}$:

When $1 \ mol$ of $NH_4OH$ reacts with $1 \ mol$ of $HCl$,the amount of heat released is.....

The enthalpy of neutralization of $NaOH$ by $HCl$ is $-55.84 \, kJ/mol$ and that of $NH_4OH$ by $HCl$ is $-51.34 \, kJ/mol$. The enthalpy of ionization of $NH_4OH$ is ..... $kJ/mol$.

What is meant by the term average bond enthalpy? Why is there a difference in the bond enthalpy of the $O-H$ bond in ethanol $(C_{2}H_{5}OH)$ and water $(H_{2}O)$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module