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

question 36

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 1.90 g of methane is combusted at constant pressure.

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