Answer to Question #193708 in General Chemistry for Earl

Question #193708

Solve Me!


1. Calculate the heat of hydrogenation of ethane, C2H4 given the following thermochemical equations:

  2 C (graphite) + 3 H2 (g) --> C2H6 (g)   ∆H=-84.5 kJ/mol

  2 C (graphite) + 2 H2 (g) --> C2H4 (g)  ∆H= 52.3 kJ/mol



2. Calculate the ∆H for the reaaction:

    CS2 (I) + 2 O2 (g) CO2 (g) + 2 SO2 (g)

  given:

     ∆HrCO2 (g)= -393.5 kJ/mol;

     ∆HrSO2= -296.8 kJ,/mol;

     ∆HrCS2 (I) = 87.9 kJ/mol


1
Expert's answer
2021-05-24T06:30:48-0400

1. Heat of hydrogenation "+" heat of combustion of ethylene"-"heat of combustion of ethane

"=52.3kJ\/mol-(-84.5kJ\/mol)=136.8kJ\/mol"

2."\\Delta H_{reaction}=\\Delta H_rCs-(\\Delta H_rSO_2+\\Delta H_rCO_2)"

"=87.9kJ\/mol-[(-393.5kJ\/mol)+(-296.8kJ\/mol)]=-751.2kJ\/mol"


Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

Jheilord
18.05.21, 09:08

Please anyone

Leave a comment

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS