I need help with these please i am not sure what I am doing wrong Please calcula

Question

I need help with these please i am not sure what I am doing wrong

Please calculate the enthalpic change of the reaction below using covalent bond strengths.

Consider the molecule acetone. Acetone has a molecular formula of C3H6O. Which of the following structural formulas would be correct?

A. About -1400 kJ B. About 770 kJ C. About 1400 kJ D. About -770 kJ E. About -300 kJ H202 (l) 2 (g) 4 H20 (I) N N bond 163 kJ/mole N H bond 391 kJ/mole O -O bond 146 kJ/mole O H bond 463 kJ/mole Nitrogen gas 941 kJ/mole AH

Explanation / Answer

reactant side:
N-H bond : 4
N-N bond : 1
O-O bond: 2
O-H bond : 4

PRODUCT SIDE:
N2 gas
O-H bond = 8

delta H = E (reactant) -E (product)
= 4*391 + 1*163 + 2*146 + 4*463 - 941 - 8*463
= -774 KJ
Answer: D

i am allowed to answer only 1 question at a time. Please ask other as different question

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---