Some Basic Principles Of Organic Chemistry Question 233
Question: Consider the following reactions at $ 1000{}^\circ C $ . $ Zn(s)+\frac{1}{2}O_2(g)\to ZnO(g);,\Delta G^{o}=-360,kJ/mol $ $ C(s)+\frac{1}{2}O_2(g)\to CO(g);,\Delta G^{o}=-400,kJ/mol $ Choose the correct statement at $ 1000{}^\circ C $ .
Options:
A) Zinc can be oxidized by CO
B) Zinc oxide can be reduced by C
C) Both statements [a] and [b] are true
D) Both statements [a] and [b] are false
Show Answer
Answer:
Correct Answer: B
Solution:
Carbon is the suitable reducing agent for zinc oxide at $ 1000{}^\circ C $ as $ \Delta G^o_{CO}-\Delta G^o_{ZnO} $ is negative.
$ \Delta G^o_{CO}-\Delta G^o_{ZnO}=-,400-(-360)=-,40 $ KJ/mol.
