calcium chloride and ammonium chloride
1. Based on the data and graphs for calcium chloride and ammonium chloride, determine which compound to use and what quantity of each compound will be needed to make a chemical hot pack and cold pack. Both packs should be calculated based on using 100 g (100 mL) of water. The hot pack should reach 60 °C, and the cold pack should go down to 3.0 °C from a room temperature of 25 °C.
Hot Pack: Compound and mass needed to achieve 60 °C above room temperature:
Cold Pack: Compound and mass needed to achieve 3.0 °C:
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5g CaCl2 100.74 10g CaCl2 100.74 15g CaCl2 100.74 5g NH.CI 100.74 5g Mass of water...
5g CaCl2 100.74 10g CaCl2 100.74 15g CaCl2 100.74 5g NH.CI 100.74 5g Mass of water (g) 10g NH.CI 100.74 10g 15g NH4Cl 100.74 5g 15g Mass of salt (g) Moles of salt (g x mol/g) Initial Temperature (°C) .045 .90 .135 26 26 26 18 18 Final Temperature (°C) 46 14 12 10 8 167.2 585.2 1254 -83.6 -250.8 -501.6 Change in Temperature (°C) AT = T- Heat absorbed by the solution (J) Slx = -(Sw.X mxX AT] Heat...
The salt ammonium chloride dissolves in water according to the reaction: NH_CI) —NH4+ (aq) + Cl(aq)...
The salt ammonium chloride dissolves in water according to the reaction: NH_CI) —NH4+ (aq) + Cl(aq) (a) Calculate the standard enthalpy change AH° for this reaction, using the following data: AH NHACI() = -314.4 kJ mol-1 AHNH4+(aq) = -132.5 kJ mol-1 AH; Cr(aq) = -167.2 kJ moll kJ (b) Calculate the temperature reached by the solution formed when 36.8 g of NH4Cl is dissolved in 0.186 L of water at 23.7 °C. Approximate the heat capacity of the solution by...
The salt ammonium chloride dissolves in water according to the reaction: NH4Cl(s) NH4+(aq) + Cl-(aq) (a) Calculate the s...
The salt ammonium chloride dissolves in water according to the reaction: NH4Cl(s) NH4+(aq) + Cl-(aq) (a) Calculate the standard enthalpy change ΔH° for this reaction, using the following data: NH4Cl(s) = -314.4 kJ mol-1 NH4+(aq) = -132.5 kJ mol-1 Cl-(aq) = -167.2 kJ mol-1 kJ (b) Calculate the temperature reached by the solution formed when 35.3 g of NH4Cl is dissolved in 0.160 L of water at 24.6 °C. Approximate the heat capacity of the solution by the heat capacity...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH,...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH, kJ/mol 17.33 25.7 Cost salt per 2.5 kg $55.87 $106.70 LICI -37.03 $157.30 CaCl, -81.6 $119.28 Draw the below table and enter your experimental data for Heat of solution/g of salt. Calculate the cost in cents) of 10g of each salt and write in the table below. Name of Salt Heat of solution/g Cost (in cents) of 10 g of salt for of salt...
B. Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitr and water vapor. How...
B. Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitr and water vapor. How many moles of dinitrogen monoxide are produced after 16.8 g of calcium nitrate and 17.50 g of ammonium fluoride react completely? How many grams How many moles of dinitrogen monoxide are produced? C. Freon-12 (CCl2F2) is synthesized by the reaction between carbon tetrachloride and antimony(III) fluoride at a temperature slightly above room temperature. Balance the following chemical equation (Hint: Balance F first.): CCL) +...
We did a lab where we dissolved calcium chloride and ammonium nitrate in water (calorimeter), and...
We did a lab where we dissolved calcium chloride and ammonium nitrate in water (calorimeter), and used the temperature change of the water to calculate the molar enthalpy of solution for each compound. I got -68.6kJ/mol for calcium chloride and +27.6kJ/mol for ammonium nitrate. There is a section in our lab report that states, "discuss the relationship between the responding and manipulated variable, and give reasons as to why this relationship exists." Our teacher told us that the manipulated variable...
Consider the dissolution of Calcium Chloride: &nbs
Consider the dissolution of Calcium Chloride: CaCl2(s)---->Ca^+2(aq) + 2Cl−(aq) ΔHrxn= -81.5kJ An 12.0 g sample of calcium chloride is dissolved in 100.0 g of water, with both substance at 22.0 degree C. Molar Mass: CaCl2= 110.98g.mol Molar Mass H20= 18.02g/mol Density of H20= 1.00g/mol Cs(soln)= 4.20 J/(g K) Will the temperature of the solution go up or down? Explain. Calculate q(reaction)
13. A solution containing 50.0 g of ammonium chloride in 100.0 mL of water at 60°C...
13. A solution containing 50.0 g of ammonium chloride in 100.0
mL of water at 60°C is: USE GIVEN GRAPH a) saturated. b)
unsaturated. c) supersaturated.
NH C KCI Grams solute per 100 g H2O 0 10 20 30 70 80 90 10 40 50 60 Temperature (°C)
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled...
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperature of the liquid stays at 24 °C for 10 minutes. why would you not want to sell a cold pack made with compound X? 3) Consider a beaker of water that has an initial temperature of 25 °C. When an ionic salt is dissolved in the water, the temperature changes to 5 °C. a. (1 pt) If...
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperatu...
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperature of the liquid stays at 24 °C for 10 minutes. Why would you not want to sell a cold pack made with compound X? 3) Consider a beaker of water that has an initial temperature of 25 °C. When an ionic salt is dissolved in the water, the temperature changes to 5 °C. a. (1 pt) If...
5g CaCl2 100.74 10g CaCl2 100.74 15g CaCl2 100.74 5g NH.CI 100.74 5g Mass of water (g) 10g NH.CI 100.74 10g 15g NH4Cl 100.74 5g 15g Mass of salt (g) Moles of salt (g x mol/g) Initial Temperature (°C) .045 .90 .135 26 26 26 18 18 Final Temperature (°C) 46 14 12 10 8 167.2 585.2 1254 -83.6 -250.8 -501.6 Change in Temperature (°C) AT = T- Heat absorbed by the solution (J) Slx = -(Sw.X mxX AT] Heat...
The salt ammonium chloride dissolves in water according to the reaction: NH_CI) —NH4+ (aq) + Cl(aq) (a) Calculate the standard enthalpy change AH° for this reaction, using the following data: AH NHACI() = -314.4 kJ mol-1 AHNH4+(aq) = -132.5 kJ mol-1 AH; Cr(aq) = -167.2 kJ moll kJ (b) Calculate the temperature reached by the solution formed when 36.8 g of NH4Cl is dissolved in 0.186 L of water at 23.7 °C. Approximate the heat capacity of the solution by...
Given the following data for each of the salts answer the questions below: KCINH.NO, Literature AH, kJ/mol 17.33 25.7 Cost salt per 2.5 kg $55.87 $106.70 LICI -37.03 $157.30 CaCl, -81.6 $119.28 Draw the below table and enter your experimental data for Heat of solution/g of salt. Calculate the cost in cents) of 10g of each salt and write in the table below. Name of Salt Heat of solution/g Cost (in cents) of 10 g of salt for of salt...
B. Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitr and water vapor. How many moles of dinitrogen monoxide are produced after 16.8 g of calcium nitrate and 17.50 g of ammonium fluoride react completely? How many grams How many moles of dinitrogen monoxide are produced? C. Freon-12 (CCl2F2) is synthesized by the reaction between carbon tetrachloride and antimony(III) fluoride at a temperature slightly above room temperature. Balance the following chemical equation (Hint: Balance F first.): CCL) +...
13. A solution containing 50.0 g of ammonium chloride in 100.0
mL of water at 60°C is: USE GIVEN GRAPH a) saturated. b)
unsaturated. c) supersaturated.
NH C KCI Grams solute per 100 g H2O 0 10 20 30 70 80 90 10 40 50 60 Temperature (°C)
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperature of the liquid stays at 24 °C for 10 minutes. why would you not want to sell a cold pack made with compound X? 3) Consider a beaker of water that has an initial temperature of 25 °C. When an ionic salt is dissolved in the water, the temperature changes to 5 °C. a. (1 pt) If...
2) (2 pts) If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperature of the liquid stays at 24 °C for 10 minutes. Why would you not want to sell a cold pack made with compound X? 3) Consider a beaker of water that has an initial temperature of 25 °C. When an ionic salt is dissolved in the water, the temperature changes to 5 °C. a. (1 pt) If...
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