Unit 6 – Thermodynamics: all topics

question 1/10: The combustion of methane is represented by: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l). If the standard enthalpies of formation are: ΔHf°[CH₄(g)] = -74. 8 kJ/mol, ΔHf°[CO₂(g)] = -393. 5 kJ/mol, and ΔHf°[H₂O(l)] = -285. 8 kJ/mol, what volume of methane gas at STP would need to be burned to heat 250 g of water from 20. 0°C to 80. 0°C?