Ch117-Lab8-CPC-p1 (1)

Lab Overview

• Lab Title: Constant Pressure Calorimetry

• Lab Number: 8

Learning Outcomes

• Determine the enthalpy change (ΔH) under constant pressure.

Objectives

• Calculate the specific heat capacity (Cs) of Magnesium metal through heat exchange measurement with surrounding water.

• Calculate the enthalpy of solution (ΔHsoln) for ammonium sulfate using the measurement of salt dissolution in water.

Materials & Equipment

• 10~20g Magnesium (Mg) solid

• Coffee cup calorimeter (with cup and lid)

• Buret stand

• Temperature Probe

• Electronic stirrer

• Magnetic stirring bar and trapper

• Laptop with logger lite software

• ~20g Ammonium sulfate

• Top loading balance with weighing paper and metal spatula

• Chemical resistant gloves

• Chemical waste beaker/tank

Lab Safety

• It is the student's responsibility to adhere to laboratory safety policies and rules, not the instructor's or TA's.

• Perform wet labs in pairs (preferred) or groups of three (if unavoidable).

• Raw data sheets must be completed individually, although discussion within lab teams is encouraged.

• Laboratory practices ensure safety for all participants.

• Chemical splash goggles with eye shields are mandatory and must be worn at all times.

• Proper handling and disposal of hazardous chemicals as outlined in the Material Safety Data Sheets (MSDS) is required.

• Record experimental measurements in permanent ink on individual raw data sheets.

• If an error occurs, cross out the original data with a single line and write the new value next to it.

• Data analysis calculations must follow significant figure rules.

  • Example: Mass of 1.00 mL of water = 1.68 g