How does Gibbs free energy indicate a reaction is spontaneous at high temperatur
ID: 875197 • Letter: H
Question
How does Gibbs free energy indicate a reaction is spontaneous at high temperatures? Remember: ?G = ?H - T?S?
The value of the negative entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are subtracted from it.
The value of the entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are subtracted from it.
The value of the entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are added to it.
There is no way that the Gibbs free energy can indicate this.
A.The value of the negative entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are subtracted from it.
B.The value of the entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are subtracted from it.
C.The value of the entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are added to it.
D.There is no way that the Gibbs free energy can indicate this.
Explanation / Answer
The answer :
The value of the entropy change and temperature product together overwhelms the positive value of the enthalpy change when they are subtracted from it.
This is because the spontaneous reaction should have -ve Delta G value.
Delta G = Delta H - Tdelta S
when delta S * T value is greater than positive value of delta H then reaction is spontaneous.
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