Question

What is the correct expression for Kc for the following reaction? 2SO3(g)​⇌2SO2(g)​+O2(g)​

a. KC​=Kp​(RT)
b. KC​=(RT)2Kp​​
c. KC​=Kp​(RT)2
d. KC​=Kp​/RT

Answer 1

The correct expression for Kc for the reaction 2SO3(g)​⇌2SO2(g)​+O2(g)​ is KC=(RT)2Kp​​.

Step-by-step explanation:

The correct expression for Kc for the reaction 2SO3(g)​⇌2SO2(g)​+O2(g)​ is option b. KC=(RT)2Kp​​.

To calculate Kc, substitute the equilibrium concentrations into the equilibrium constant expression. Then, identify the exponent 'An' as -1 for a reverse reaction. Finally, use the equation Kp = K(RT)An to solve for Kp.

For this specific reaction, Kp is equal to 1.2 x 10³.