Question

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

• A. Exothermic and decreasing disorder
• B. Endothermic and increasing disorder
• C. Exothermic and increasing disorder
• D. Endothermic and decreasing disorder

Answer 1

Answer: (C)

Exothermic and increasing disorder

Answer 2

A spontaneous reaction will undoubtedly occur in a chemical process that is exothermic and has an escalating disorder.
H is negative because the process is exothermic. S is positive since the illness is becoming worse.
$\triangle$G= $\triangle$H−T$\triangle$S =−ve−(+ve×+ve)=−ve
G has a negative value, which is consistent with spontaneous process.

Therefore, the correct option is (C): Exothermic and increasing disorder