7. Consider the following reactions: i. H₂ + 1/2O₂- H₂O ii. 2N₂ + 1/2O₂ + 90.7 kJ iii. C + ½₂20₂ iv. ½/2H₂ + ½/₂2/₂ AH-243 kJ/mol - → H₂O →CO+110.77 kJ HI AH = 26 kJ/mol Which of the reactions above are exothermic? a) i & ii b) i & iii c) i & iv d) ii & iv

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7. Consider the following reactions:
1. H₂ + 1/₂20₂
H₂O
→➜
AH = -243 kJ/mol
H₂O
CO+ 110.77 kJ
HI
ii. 2N₂2 + 1/2O₂ + 90.7 kJ
iii. C + ½₂20₂
iv. 1/2H₂ + ½/212-
AH = 26 kJ/mol
Which of the reactions above are exothermic?
a) i & ii
b) i & iii
c) i & iv
d) ii & iv
Transcribed Image Text:7. Consider the following reactions: 1. H₂ + 1/₂20₂ H₂O →➜ AH = -243 kJ/mol H₂O CO+ 110.77 kJ HI ii. 2N₂2 + 1/2O₂ + 90.7 kJ iii. C + ½₂20₂ iv. 1/2H₂ + ½/212- AH = 26 kJ/mol Which of the reactions above are exothermic? a) i & ii b) i & iii c) i & iv d) ii & iv
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