Homework Question 8.63 (c)

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Tia Tomescu 2D
Posts: 42
Joined: Fri Sep 29, 2017 7:06 am

Homework Question 8.63 (c)

Postby Tia Tomescu 2D » Sat Jan 13, 2018 6:53 pm

I checked my equations many times, but my value always comes to -38.72kJ while the answer is 15.28kJ. The previous two questions, (a) and (b) are similar to (c) and I used the same method: enthalpy of products - enthalpy of reactants. Does anyone know how to solve this?

Curtis Tam 1J
Posts: 105
Joined: Thu Jul 13, 2017 3:00 am

Re: Homework Question 8.63 (c)

Postby Curtis Tam 1J » Sat Jan 13, 2018 7:44 pm

Smh tomato. Check solution manual errors.

Miranda 1J
Posts: 51
Joined: Fri Sep 29, 2017 7:06 am

Re: Homework Question 8.63 (c)

Postby Miranda 1J » Sat Jan 13, 2018 9:31 pm

you do DH= [(2DHf K2S)+(2DHf H2O)] - [(DHf H2S)+(2DHf KOH)] this should be =[-417.5 kJ/mol + 2(-285.83 kJ/mol)] - [-39.7 kJ/mol + 2(-482.37 kJ/mol)] = +15.28 kJ/mol

Hope that makes sense


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