Question
For a reaction to be spontaneous at any temperature, the conditions are
A.
$$\Delta H = + ve,\Delta S = + ve$$
B.
$$\Delta H = - ve,\Delta S = - ve$$
C.
$$\Delta H = + ve,\Delta S = - ve$$
D.
$$\Delta H = - ve,\Delta S = + ve$$
Answer :
$$\Delta H = - ve,\Delta S = + ve$$
Solution :
$$\Delta G = \Delta H - T\Delta S$$
$$\Delta G = - ve\,\,{\text{if}}\,\,\Delta H = - ve\,\,$$ $${\text{and}}\,\,\Delta S\,\,{\text{is}}\,\, + ve.$$