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What Is the Quantity of Heat Evolved at Constant Pressure

Question 75

Multiple Choice

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) + What is the quantity of heat evolved at constant pressure when 30.5 g H<sub>2</sub>O(l) is formed from the combustion of H<sub>2</sub>(g) and O<sub>2</sub>(g) ? H<sub>2</sub>(g) + O<sub>2</sub>(g) → H<sub>2</sub>O(l) ; ΔH° = -285.8 kJ A) 5.92 × 10<sup>-3</sup> kJ B) 285.8 kJ C) 8.72 × 10<sup>3</sup> kJ D) 168 kJ E) 4.84 × 10<sup>2</sup> kJ
O2(g) → H2O(l) ; ΔH° = -285.8 kJ


A) 5.92 × 10-3 kJ
B) 285.8 kJ
C) 8.72 × 103 kJ
D) 168 kJ
E) 4.84 × 102 kJ

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