In an experiment to determine the enthalpy of combustion of an alcohol
CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
In an experiment to determine the enthalpy of combustion of an alcohol, the mass of a burner plus its contents, and the temperature of a known mass of water in a calorimeter are measured before and after the experiment. What are the expected results?
(1) Mass of burner and contents: decreases; reading on thermometer: increases
(2) Mass of burner and contents: decreases; reading on thermometer: stays the same
(3) Mass of burner and contents: increases; reading on thermometer: increases
(4) Mass of burner and contents: increases; reading on thermometer: stays the same