CHEM 103 Module 3 Exam Portage Learning 2023

CHEM 103 Module 3 Exam Portage Learning 2023. NH4Cl is being dissolved in water and this process is being studied in a styrofoam coffee cup with a lid and the heat absorbed is measured by means of a thermometer immersed in the reaction mixture. Enter the correct thermochemistry term to describe the item listed. 1. The type of thermochemical process 2. The air above the cup Your Answer: 1) endothermic 2) Surroundings 1. Heat absorbed = Endothermic process 2. The air above the cup = Surroundings Question 2 7 / 10 pts You may find the following resources helpful: Scientific Calculator Periodic Table Equation Table Download Equation Table 1. Show the calculation of the final temperature for a 18.5 gram piece of copper heated to 100oC which has been added to a 45.2 gram sample of water at 23.2oC in a coffee cup calorimeter. c (water) = 4.184 J/g oC; c (Cu) = 0.384 J/g oC 2. Show the calculation of the energy involved in condensation of 165 grams of steam at 100oC if the Heat of Vaporization for water is 2.26 kJ/g. Your Answer: 1) -[18.5 g * 4.184 KJ/g C * (Tmix - 100 C)] = [45.2 g * 0.384 J/g C * (Tmix - 23.2 C)] 2) 165 g * 2.26 KJ/g = 372.9 KJ since heat is being taken out = - 372.9 KJ 1. - (mCu x cCu x ∆tCu) = (mH2O x cH2O x ∆tH2O)