Saturday

April 19, 2014

April 19, 2014

Posted by **Rob** on Saturday, December 8, 2012 at 8:30pm.

DH°(kJ)

K(s) → K(g) 89

K(g) → K⁺(g) + e⁻ 419

Br2(l) → 2 Br(g) 193

K(s) + 1/2 Br2(g) → KBr (s) -394

KBr(s) → K⁺(g) + Br⁻(g) 674

I know the answer is -325 kj, I want to know how to get it. Thanks

- Chemistry -
**DrBob222**, Saturday, December 8, 2012 at 9:08pmsub = sublimation

ip =- ionization potential

DE = dissociation energy

EA = electron affinity

Hf = heat formation

Ecrystal = reverse last equation

dHf = dHsub + ip + 1/2(DE) + EA + Ecryst

-394 = 89+419+96.5+EA-674

Solve for EA.

**Related Questions**

chemistry - use the data given below to construct a Born-Haber cycle to ...

Math 157-1 - Use the data in the grade-distribution Use the data in the grade-...

statistics - Use the data given in table 13.1 on page 846 to construct a ...

math - Write the word or phrase that best completes each statement or answers ...

Math - I have 3 questions: 1. Construct a data set of 8 items that has a mean ...

stats - Use the given degree of confidence and sample data to construct a ...

Math - Can someone help me with this: Descibe how to construct a histogram for a...

Chemistry - Hi, could someone please take a look at the following question? Use ...

home economics - You are gathering demographic data in a village. You suspect ...

World Geography - Which statement describes negative population growth? A) Fewer...