Introduction Four reactions were done using coffee cup calorimetry for each. Two Styrofoam cups were stacked together for each reaction performed, with a piece of cardboard used as lid with a hole for the thermometer. The beginning and final temperatures were taken for all reactions and solvents used. The end result and point of the experiment is to find what ΔH. Also this is a constant pressure calorimetry experiment. The goal of each of the reactions is to get ΔHrxn which is represented in the equation,
ΔH = qP (1) with ΔHrxn being enthalpy, qP being the heat at constant pressure1. This is important because the calorimetry experiment is done at constant pressure. However, other equations are needed before qP can be found. The steps to get to equation 1 include finding the molarity of the solution is found using the equation: …show more content…
This leads to finding the Tinitial after using the ΔT equation. To solve for Tinitial the equation used is:
Tinitial = (mA*TA + mB*TB )/mT (3) with Tinitial being the average temperature, mA being the mass of solution A, TA being the temperature of solution A, mB being the mass of solution B, TB being the temperature of solution B, and mT being the total mass of both solutions1. To calculate heat, the total mass of the solution is needed.
Heat is an important factor in this experiment, because it is the determining factor for enthalpy. In order to determine the heat of the reaction, heat of the solution must be determined first by using the equation: q = (mT)*(s)*(ΔT)
ΔH = qP (1) with ΔHrxn being enthalpy, qP being the heat at constant pressure1. This is important because the calorimetry experiment is done at constant pressure. However, other equations are needed before qP can be found. The steps to get to equation 1 include finding the molarity of the solution is found using the equation: …show more content…
This leads to finding the Tinitial after using the ΔT equation. To solve for Tinitial the equation used is:
Tinitial = (mA*TA + mB*TB )/mT (3) with Tinitial being the average temperature, mA being the mass of solution A, TA being the temperature of solution A, mB being the mass of solution B, TB being the temperature of solution B, and mT being the total mass of both solutions1. To calculate heat, the total mass of the solution is needed.
Heat is an important factor in this experiment, because it is the determining factor for enthalpy. In order to determine the heat of the reaction, heat of the solution must be determined first by using the equation: q = (mT)*(s)*(ΔT)