Question

A reaction, A + B → C + D + q is found to have a positive entropy change. The reaction will be:
(i) possible at high temperature
(ii) possible only at low temperature
(iii)not possible at any temperature
(iv) possible at any temperature

Answer 1

Entropy: It is a term used to measure "disorder or randomness".

Positive entropy: It denotes the probability required to make particular state depends on the number of ways in which that arrangement.

${ S }_{ solid }\quad <\quad { S }_{ Gas }\quad <<\quad { S }_{ liquid }\quad$

Entropy completely depends upon the microstates of the system, increase the microstates of the system and increase the entropy and also increase the positive value of S.