What is the quantity of heat evolved at constant pressure when 30.5 g H2O(l) is formed from the combustion of H2(g) and O2(g)?                           H2(g) + (1/2) O2(g)  →  H2O(l); ΔH° = –285.8 kJ a. 8.72 × 10^3 kJ b. 168 kJ c. 4.84 × 10^2 kJ d. 5.92 × 10^–3 kJ e. 285.8 kJ

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What is the quantity of heat evolved at constant pressure when 30.5 g H2O(l) is formed from the combustion of H2(g) and O2(g)?

                          H2(g) + (1/2) O2(g)  →  H2O(l); ΔH° = –285.8 kJ

a. 8.72 × 10^3 kJ
b. 168 kJ
c. 4.84 × 10^2 kJ
d. 5.92 × 10^–3 kJ
e. 285.8 kJ
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