BRAINLIEST FOR CORRECT ANSWER In a reaction the 48cm3 of gas is produced in 97 seconds. Remember to check worked example 2 and calculate the rate of reaction.

In a reaction the mass of a reactant changes from 43g at the start to 22g at the end. This takes 79 seconds. What is the rate? (hint – you can use the two masses to work out the mass of reactant lost)

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