Lab: Enthalpy Answers

A coffee cup calorimeter will not be used to directly measure the enthalpy of magnesium combustion because the reaction occurs too slowlyX the reaction occurs too fastthe coffee cups are too small✔ the coffee cups could melt.

The calorimeter is made of coffee cups instead of a beaker because coffee cups are more breakablemore flexible✔ better insulatorsare less expensive than beakers.

You will not measure the enthalpy of the reaction of HCl and MgOHCl and Mg✔ H2 and O2 in the coffee cup calorimeter because this reaction involves gases. Instead, you will use a well-known published value.