Answer to Question #164546 in General Chemistry for jeffy

Question #164546

The standard heat of formation of calcium oxide is -635.1 kJ/mol. How much heat is released when 3.8 grams of oxygen gas reacts with excess calcium in the formation of calcium oxide?


1
Expert's answer
2021-02-18T07:44:30-0500

The balanced thermochemical equation is;

"Ca_{(s)}+O_{2{(g)}}\\to CaO_{2{(s)}}"

From the equation, the energy change of "O_2" from grams to moles is;

"3.8_gO_2\\times" "1mol O_2\\over 16.01gO_2" "\\times" "-635.1kJ\/mol\\over 1mol O_2"

"=-150kJ"


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

No comments. Be the first!

Leave a comment

Ask Your question

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS