Question

S. Determine the percent yield of the following reaction when 2.80 g of Preacts with excess oxygen. The actual yield of this reaction is determined to by 3.89 g of P,Os. One 4 P +502 +2P205 12.803 t Properties of Liquids and Solids Instructions: Answer the following questions using the following information: AH 6.02 ku/mol; AH 40.7 kJ/mol; specific heat of water is 4.184 J/g °C, specific heat of ice is 2.063/8'C specific heat of water vapor is 2.03 J/g.c. 1. How much heat is required to vaporize 25 g of water at 100°C? 2. How much heat is required to convert 25 g of ice at -4.0 C to water vapor at 105 "Creport your answer to three significant figures)? TIJ 3. An ice cube at 0.00'C with a mass of 8.32 g is placed into 55 g of water, initially at 25°C. If no heat is lost to the surroundings, what is the final temperature of the entire water sample after all the ice is melted (report your answer to three significant figures)? 8 8 8 ,0) Mixtures and Solutions Instructions: Use the following image to answer the following questions. 1. A solution contains 40 g of NaCl per 100 g of water at 100°C. Is the solution unsaturated, saturated or supersaturated? PINO kaip Solubiy lo saitin 100 7 8 8 8 8 8 Nic 0 Co,(50.), 30 40 50 60 70 80 90 100 Temperature (°C) 10 20 2. A solution contains 50 g of KCI per 100 g of water at 25°C. Is the solution unsaturated, saturated or supersaturated? Solubility Graph (Online Image). Retrieved November 12, 2018 from https://socratic.org/chemistry/solutions and their behavior/solubility graphs

#5

Answer 1

#5 up +502 - 2 P2O5 mol = mas a 2.80 30.97 mo mol = 0.0904 mol 4 mol e dreact with 5 mol O₂ and form 2 mol 120 so vol P2O5 = t x 0.0904 = 0.0452 mol 141.94. mass Por = 0.0452 X z 6.415 Gm mpor % yield - actual yield Xloo Theosticul gold 3.gg -xloo = 60.6 % % Gilld = 6.45