8. Thermochemistry

Which statement best describes how a constant-pressure calorimeter works?

In constant-pressure calorimetry, what is the primary purpose of calibrating the calorimeter before performing experiments?

Which device is commonly used to measure heat transfer during chemical reactions at constant pressure?

Which of the following best defines a calorimeter in the context of constant-pressure calorimetry?

Which of the following best describes a constant-pressure calorimeter?

Using a coffee-cup calorimeter, the ΔH_rxn for the dissolution of KCl(s) into KCl(aq) is determined. The initial temperature of the water in the calorimeter is 26.5°C. After the reaction, the temperature is measured again and found to be 23.0°C. What is the sign of ΔH_rxn for this reaction?

Which of the following is a proper use for a constant-pressure calorimeter?

In constant-pressure calorimetry, how does a calorimeter measure the enthalpy change (ΔH) of a chemical reaction?

In a coffee-cup calorimeter used for constant-pressure calorimetry, what is the primary role of the coffee cup?

In constant-pressure calorimetry, which method should be used when stirring the contents of the calorimeter to ensure accurate measurement of heat change?