In the Presence of Excess Oxygen,methane Gas Burns in a Constant-Pressure

question 45

Multiple Choice

In the presence of excess oxygen,methane gas burns in a constant-pressure system to yield carbon dioxide and water: CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (l) △H = -890.0 kJ
Calculate the value of q (kJ) in this exothermic reaction when 1.80 g of methane is combusted at constant pressure.

• A)-100.1 kJ
• B)0.0324 kJ
• C)-0.0100 kJ
• D)30.9 kJ
• E)-1.00 × 10⁵ kJ

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