Using the values given of standard enthalpies of formation, calculate the ΔHreactiono for the formation of NO2(g). 2NO(g)+O2(g)⇋2NO2(g)

O2(g): 0 kJ/mol
NO(g): 90.25 kJ/mol
NO2(g): 33.18 kJ/mol

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In apex! a liquid heated beyond a certain temperature becomes

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

Calculate the mass of 0.750 mol of the following substance. na3po4.