Homework Help: Chemistry(Please help)

Posted by Hannah on Tuesday, April 24, 2012 at 11:35am.

1) Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is

2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227oC

Using delta Ho = 81.2 kJ and delta So = 128 J/K, calculate the value of the equilibrium constant for this reaction.

I do not know how to start this problem or what formula I should use.

Chemistry(Please help) - DrBob222, Monday, April 23, 2012 at 7:50pm
dGo = dHo - TdSo
Then dGo = -RTlnK

So for delta G= delta H - T delta S it would be delta G= 81200 J/K - 500K(128J/k)

This would equal 17200. Did I do this correctly so far before I move on?

Chemistry(Please help) - DrBob222, Tuesday, April 24, 2012 at 2:22pm
so far so good.
Chemistry(Please help) - Hannah, Tuesday, April 24, 2012 at 3:10pm
Now I do delta G = -RT lnK

So 17200 = -8.314(500) lnk

17200 = -4157 ln k

This is where I am not sure what to do next do I add 4157 to the left side and then take the ln?
Chemistry(Please help) - DrBob222, Tuesday, April 24, 2012 at 3:25pm
-17200/4157 = ln K

k = about 0.016 (but not exact).

Answer this Question

Related Questions

Chemistry(Please help) - 1) Nitrosyl chloride (NOCl) decomposes at high ...
chemistry - Nitrosyl chloride (NOCl) decomposes at high temperature. The ...
chemistry - Nitrosyl chloride (NOCl) decomposes at high temperature. The ...
Ap Chemistry - Hi, I was wondering if you could possibly help me with this chem ...
chemistry - Nitrosyl chloride, NOCL, decomposes to NO and C1 in accordance with...
Chemistry - 0.500 moles of NOCl is placed in a 1.00L vessel at 700K,and after ...
Chem II - 2 NOCl(g) --> 2 NO(g) + Cl2(g) Let’s assume that at a ...
Chem II - 2.5 mol NOCl(g) was placed in a 2.50 L reaction vessel at 400 degrees ...
chemistry - I have been at this question for at least three hours now. Consider ...
Chemistry - Consider the following reaction: 2NOCl(g) 2NO(g) + Cl2(g) Initially...

For Further Reading

First Name:
School Subject:
Answer: