Q. Calculate the free energy change of $2CuO(s) \rightarrow Cu_{2}O(s) + \frac{1}{2}O_{2}(g)$ Given, $\mathrm{\Delta}H = 145.6$kJ per mol $\mathrm{\Delta}S = 116$ J per mol per K

A) 113.8 kJ per mol
B) 221.5 kJ per mol
C) 55.4 kJ per mol
D) 145.6 kJ per mol
Explanation

(a)
Use $\mathrm{\Delta}G = \mathrm{\Delta}H - T\mathrm{\Delta}S$
$\mathrm{\Delta}G = 145.6 - 273 \times 0.116$
$= 113.93\ kJ/mol$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.