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### HW Problem 5H.1

Posted: **Thu Jan 10, 2019 9:29 pm**

by **Gisela F Ramirez 2H**

N2 (g) + 3H2 (g) <---> 2NH3 (g) at 400. K, K=41

Find the value of K:

a) 2NH3 (g) <---> N2 (g) + 3H2 (g)

answer: 1/K : 0.024

But how do I find the K value for the other reactions?

b) 1/2 N2 (g) + 3/2 H2 (g) <---> NH3 (g)

c)2N2 (g) + 6H2 (g) <---> 4NH3 (g)

### Re: HW Problem 5H.1

Posted: **Thu Jan 10, 2019 9:37 pm**

by **Chem_Mod**

If a reaction is multiplied by a number X, the equilibrium constant K' of the new reaction will be K^(X)

### Re: HW Problem 5H.1 [ENDORSED]

Posted: **Thu Jan 10, 2019 9:55 pm**

by **Swetha Ampabathina1I**

For part B, since you are technically working with the exponents, you'd have to square root the K to get the answer. Whereas, for part c the coefficients (which become exponents) are doubled so you would have to square the K.

### Re: HW Problem 5H.1

Posted: **Fri Jan 11, 2019 12:59 am**

by **Andie Jian 1D**

Here's a helpful table from the book (pg. 410 7th edition) summarizing these rules. It also explains these concepts with more examples on that page if you need more clarification.

### Re: HW Problem 5H.1

Posted: **Fri Jan 11, 2019 9:27 am**

by **abbydouglas1K**

Swetha Ampabathina1I wrote:For part B, since you are technically working with the exponents, you'd have to square root the K to get the answer. Whereas, for part c the coefficients (which become exponents) are doubled so you would have to square the K.

So does this mean that every time you have molar coefficients that are less than one. i.e; (1/2)N2 + (3/2)H2 <--> NH3 K is always just the square root?