Posted by CHRIS on .
Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is
2 NOCl (g) > 2 NO (g) + Cl2 (g) at 227C
Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction.
a 1.60 X 102
b. 2.1 X 107
c. 62.8
d. 4.9 X 106
e. 3,20 X 109
help no idea?

chemistry 
DrBob222,
dGo = dH  TdS
Subwstitute T, dS, and dH and solve for dG. Then dG = RTlnK
Solve for K.
Don't forget that dH has units of kJ/mol and dS has units of J/mol. 
chemistry 
CHRIS,
the new delta s= .128
81.2(227x.128)=52.144
52.144=rtlnk
what is rt? 
chemistry 
DrBob222,
R is 0.08206 just like in PV = nRT.
T is listed in the problem as 227 C (which must be converted to kelvin). 
chemistry 
CHRIS,
still not getting ans

chemistry 
DrBob222,
Show your work.