A 50.00 g sample of an unknown metal is heated at 45.00°C. It is then placed in a coffee-cup calorimeter filled with water. The calorimeter and the water have combined mass of 250.0•°g an and overall specific heat of 1.035 cal/g•°C. The initial temperature of calorimeter is 10.00°C. The system reaches a final temperature of 11.08°C when the metal is added.

Calculate the standard enthalpy of formation of liquid methanol, ch3oh(l), using the following information: c(graphite) + o2 latex: \longrightarrow ⟶ co2(g) latex: \delta δ h° = –393.5 kj/mol h2(g) + o2 latex: \longrightarrow ⟶ h2o(l) latex: \delta δ h° = –285.8 kj/mol ch3oh(l) + o2(g) latex: \longrightarrow ⟶ co2(g) + 2h2o(l) latex: \delta δ h° = –726.4 kj/mol