Question

What is the value for AG at 5000 K if AH = -220 kJ/mol and S= -0.05 kJ/(mol-K)?

A. -195 kJ
B. -470. kJ
C. 30 kJ
D. 470 kJ

Answer 1

C. 30 kJ

Step-by-step explanation:

Hello there!

In this case, in agreement to the thermodynamic definition of the Gibbs free energy, in terms of enthalpy of entropy:

`\Delta G= \Delta H-T\Delta S`

It is possible to calculate the required G by plugging in the given entropy and enthalpy as shown below:

`\Delta G=-220kJ/mol-5000K*-0.05kJ/mol*K\\\\\Delta G=30kJ/mol`

Therefore, the answer is C. 30 kJ .

Best regards!