A chemical reaction has an increase in entropy and a decrease in enthalpy. The chemical reaction is spontaneous. A chemical reaction is spontaneous if it has an entropy greater than zero and an enthalpy less than 0
Answer: Reaction is spontaneous at all temperatures.
Explanation:
According to Gibb's equation:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
[tex]\Delta G[/tex] = Gibbs free energy
[tex]\Delta H[/tex] = enthalpy change
[tex]\Delta S[/tex] = entropy change
T = temperature in Kelvin
[tex]\Delta G[/tex]= +ve, reaction is non spontaneous
[tex]\Delta G[/tex]= -ve, reaction is spontaneous
[tex]\Delta G[/tex]= 0, reaction is in equilibrium
Thus when [tex]\Delta H[/tex] = -ve (decrease in enthalpy)
[tex]\Delta S[/tex] = +ve (increase in entropy)
[tex]\Delta G=(-ve)-T(+ve)[/tex]
[tex]\Delta G=(-ve)(-ve)=-ve[/tex]
Thus Reaction is spontaneous at all temperatures.
